Trivia: Actor Mark Harmon is the son of football great Tom Harmon and 1940s film star Elyse Knox; he is the brother of Kris Harmon -- ex-wife of Ricky Nelson -- and uncle of Kris and Ricky's actress daughter Tracy Nelson; and finally, Harmon is the husband of Mork and Mindy star Pam Dawber. Harmon emulated his dad by playing football at UCLA, then followed in mom's footsteps by turning to acting; his first movie was 1978's Comes a Horseman. Most of Harmon's starring film appearances are easy to take but unmemorable, such as his lackadaisical high-school teacher in Summer School (1988). A baseball fan, Harmon was once part-owner of the minor-league San Bernardino Spirit, a team which figured prominently in his 1988 film vehicle Stealing Home. Harmon is best known for his work on 1980s series TV: he has co-starred in Flamingo Road and Moonlighting, and played the lead role of AIDs-stricken Dr. Bob Calswell on St. Elsewhere. TV would prove to be a source of success for the actor, and he would go on to star on such popular shows as Chicago Hope and NCIS.

Trivia: David McCallum's parents were both members of the London Philharmonic; his mother was a cellist and his father was first violinist. The young Scots-born McCallum himself planned to pursue a musical career after serving with the Royal West African Frontier Force, but decided instead upon acting. Following his studies at the RADA, McCallum entered films in 1957, where he was usually cast as a troublemaking street punk or callow junior officer. His first American film (albeit lensed principally in England) was Freud (1962), in which he played a profoundly mother-obsessed mental patient. McCallum became the rage of the teeny-bopper set when he was cast as cool-headed Russian secret agent Ilya Kuryakin on TV's The Man From UNCLE (1964-68). At one point, McCallum was receiving far more fan mail than the series' ostensible star, Robert Vaughn; he took advantage of his celebrity to launch a brief singing career, duetting with Nancy Sinatra on the 1966 UNCLE episode "The Take Me to Your Leader Affair." He also wrote the music and lyrics and sang the title song of his 1967 movie vehicle Three Bites of the Apple. Following UNCLE, McCallum had a handful of solid dramatic film roles before returning to the small screen in the short-lived 1975 series The Invisible Man. He continued to appear primarily in episodic television, although he occasionally could be glimpsed on the big-screen as well. Highlights include The Watcher in the Woods, Matlock, The Wind, Murder She Wrote, and The A-Team. The nineties began with a major part in the sleeper Hear My Song, before continuing in Healer, Law and Order, and Cherry. McCallum became a fixture on television yet again at the beginning of the 21st century when he was cast as Donald "Ducky" Mallard on CBS' drama NCIS, which was for a time the top-rated scripted drama on network television.A man of sundry outside interests, McCallum's range of expertise includes computers and small-arms weaponry. Once wed to actress Jill Ireland, David McCallum has since 1967 been married to Katherine Carpenter.

Trivia: Actor Sean Murray began filling up his resumé when he was just a young teenager, making small appearances in movies like Hocus Pocus and This Boy's Life. He continued to steadily wrack up small and midsized roles in films and on television until 2004, when he joined the cast of the series NCIS playing Timothy McGee. His stepsister, Troian Bellisario, has appeared in NCIS as Murray's character's sister.

Trivia: A graduate of the famous School for the Performing Arts, actor Rocky Carroll continued his studies at the Conservatory of Theatre Arts at Webster University before moving to New York in the mid-'80s to try his hand at a professional acting career. He soon found success with the Shakespeare on Broadway series, and cultivated a flourishing career on-stage. Carroll also branched into screen acting, with recurring roles on Roc and Chicago Hope, and in movies like Crimson Tide, Born on the Fourth of July, and Yes Man.

Trivia: A graduate of Colorado's Niwot High School, actor Brian Dietzen gravitated to drama at eight years old, when he caught the acting bug from an elementary school play; in time, he extended his stage activities into high-school productions, and attended the University of Colorado at Boulder as a theater major in that institution's B.F.A. program. Under the mentorship of Sean Kelley, Dietzen formally trained in theatrical mainstays -- from Waiting for Godot to Equus; so successful were his efforts in these productions that it prompted him to join the Colorado Shakespeare Festival after graduation, and then to make the big leap to Los Angeles. Dietzen scored his first major coup in L.A. by signing on for a regular role in the short-lived WB series My Guide to Becoming a Rock Star, and then landed a small part in the American Idol spin-off movie From Justin to Kelly (2003). The actor is best known, however, for his recurring series role as Jimmy Palmer, assistant lab technician to Donald "Ducky" Mallard (David McCallum), on the popular CBS procedural thriller NCIS. On the side, he remained extremely active in stage work.

Trivia: Dropped out of college and took public speaking classes to help further her career. At the premiere of Gone (2012) she admitted she's always had a fear of being kidnapped. Was cast in NCIS in 2013 as a replacement for the departing Cote de Pablo; she was promoted to a series regular before her first episode aired.

Trivia: In his role as eager-to-fit-in exchange student Fez on the enduring and popular Fox sitcom That '70s Show, actor Wilmer Valderrama mangled the popular lingo of the eponymous decade with gleeful abandon. Though removed from his small-screen persona, the handsome actor can give the impression of a young Benicio Del Toro. His dorky and personable charm as Fez endeared him to television audiences, making him one of That '70s Show's defining personalities. Born January 30th, 1980, Valderrama is a Miami native whose family relocated to Venezuela when he was three years old; the aspiring actor would eventually return stateside to pursue a career in the entertainment industry. Valderrama joined the cast of That '70s Show shortly before finishing his high-school education at William Howard Taft High School in 1998, and three short years later, the television mainstay made his feature debut by taking to the diamond with a supporting role in the romantic teen comedy Summer Catch. Guest appearances on Grounded for Life and That '70s Show co-star Ashton Kutcher's hidden-camera prankster series, Punk'd, were quick to follow, and in 2003, Valderrama essayed the role of DJ Keoke in the flashy true-crime drama Party Monster. Based on the exploits of murderous club-kid Michael Alig, the film offered Valderrama an opportunity to truly separate himself from his popular small-screen persona. With That '70s Show still going strong in 2004, the popular television star's voice could also be heard in the animated children's film Clifford's Really Big Movie. 2006 found the actor playing a small supporting role for the scathing message movie Fast Food Nation, and took on the role of Detective Efrem Vega for the NBC television series Awake.Valderrama continued to concentrate on TV, booking guest arcs on shows like Suburgatory and Raising Hope before settling into more stable work with regular gigs on From Dusk till Dawn: The Series and the short-lived Minority Report series. In 2016, he joined the cast of NCIS for the 14th season of the show.

Trivia: Born in Pennsylvania c. 1967, Maria Bello attended Villanova University as a political science major, but acting ability - evident from an early drama class - altered her career plans. Following graduation, Bello honed her acting skills in a number of New York theater productions before she broke through to the public as one of the leads in the short-lived TV spy comedy Mr. and Mrs. Smith (1996). Bello gained broader primetime exposure as Dr. Anna Del Amico on NBC's blockbuster ER during the 1997 season and segued into films with her performance as recovering junkie Ben Stiller's confidante in the film-a-clef Permanent Midnight (1998), adapted from Jerry Stahl's harrowing book.Bello scored her first pop hit as Mel Gibson's beautiful cohort in the harsh crime drama Payback (1999). Poised to potentially become one of the select group of actors who transition smoothly from television to film, Bello co-starred as one of the bottle-tossing, bar-stomping babes in charge of the titular drinking establishment in the Bruckheimer-produced hellraiser Coyote Ugly (2000). When Coyote Ugly failed to live up to box office hopes, Bello starred as Suzi Loomis in Bruce Paltrow's Duets, and as Ruth Harkness in the IMAX feature China: The Panda Adventure (2001), based on her real-life experiences with the eponymous creatures. Bello scored a bona fide critical, if not financial, hit with Paul Schrader's biopic about slain Hogan's Heroes star Bob Crane, Auto Focus (2002). As Crane's co-star and second wife Patricia, Bello holds her own opposite Greg Kinnear's bravura performance as the nymphomaniacal Crane, evoking the complex emotions of a spouse who accepts yet ultimately cannot contend with her husband's desires.A year after Auto Focus, Bello would score even bigger with the critics with a starring role alongside William H. Macy in the gritty Vegas romance The Cooler. As the cocktail waitress who falls for Macy's sadsack ne'er-do-well, Bello brought a sense of extreme realism to her character. The film netted her a Best Supporting Actress nomination from the Screen Actors Guild and a runner-up prize from The National Society of Film Critics.In early 2004, Bello appeared as Johnny Depp's estranged wife in the Stephen King adaptation The Secret Window, and in John Sayles' well-received political thriller Silver City. Though subsequent appearances in the fairly forgettable Assault on Precinct 13, The Dark, and The Sisters followed in 2005, Bello's Golden Globe-nommed performance as an unassuming housewife who married into mystery in A History of Violence, coupled with her prominent performance as a determined alcohol lobbyist in the critically-acclaimed Thank You for Smoking, helped to get her back in the good graces of critics and end the year on a decidedly high note. When 2006 arrived, Bello joined Nicolas Cage, Michael Pena, and Maggie Gyllenhall in World Trade Center, Oliver Stone's docudrama/survival picture that recounted the experiences of two Port Authority firefighters trapped beneath the rubble of the destroyed buildings. Bello joins the cast of the same year's Flicka, adapted from the seminal children's novel by Mary O'Hara (and incarnated decades prior as the movie and TV series My Friend Flicka) , alongside Alison Lohman and country singer Tim McGraw.Bello had a lead part in Alan Ball's feature film directorial debut Towelhead in 2007, and tackled the indie horror film Downloading Nancy the next year. In 2010 she scored a small part in the Adam Sandler comedy Grown Ups as well as major parts in a couple of dramas - The Company Men and Beautiful Boy.She next returned to television, taking the lead role in the NBC remake of the British series Prime Suspect in 2011. The show was cancelled after only 13 episodes, but Bello quickly booked another television role, in the second season of Fox's Touch, opposite Kiefer Sutherland. That show was also canceled after that season, and Bello returned to film, reprising her role in Grown Up 2 in 2013.Active in social causes as well, Maria Bello co-founded the Harlem not-for-profit arts and education program, Dream Yard Drama Project for Kids.

Trivia: Whether following in the footsteps of the seemingly irreplaceable Robert Reed as the all-wise patriarch of the Brady clan or raising the ire of a nation of embittered office workers as the blissfully malevolent Lumbergh in Mike Judge's popular workplace comedy Office Space, longtime character actor Gary Cole can always be depended on to bring life to his varied and oddly endearing characters, despite their sometimes questionable motivations. Even in his earliest role as Snoopy in a high school production of You're a Good Man Charlie Brown, the Park Ridge, IL, native knew his destiny lay on the stage; from that moment straight through Cole's higher education at Illinois State University, his dedication to the theater never wavered. So dedicated was Cole that, during his third year at I.S.U., the eager up-and-comer dropped out to help found the Remains Theater. Transferring over to Chicago's acclaimed Steppenwolf Theater in 1985, Cole quickly made a name for himself in such productions as Cat on a Hot Tin Roof and Balm in Gilead. Though Cole had essayed a handful of television roles in the early '80s, it wasn't until his breakthrough role as a suspected murderer in the 1984 made-for-television feature Fatal Vision that audiences truly began to take notice. Cole's role as the drug-addicted son of an alcoholic father in the 1986 made-for-TV drama Vital Signs showed that he undoubtedly had the chops to make it on the small screen. Despite an increase in television roles, the ambitious actor continued to impress on the stage as well. Cole's first taste of weekly series life came with his role as a former cop who finds redemption as a late-night radio talk show host in the 1989 series Midnight Caller. In the following decade, he would expand his career into feature film territory. Cole's silver-screen career began with a role as a Secret Service agent in the Clint Eastwood thriller In the Line of Fire (1993), and his natural skills onscreen lent a surprising amount of depth to the supporting role. A few supporting television performances were quick to follow, and in 1995, Cole cracked up audiences with his role as suburban philosopher Mike Brady in the hit comedy The Brady Bunch Movie. Cole would reprise the role in the following year's sequel A Very Brady Sequel, but not before returning to series work as the sheriff in the short-lived, but well-loved, oddity American Gothic. As his feature career gained momentum, Cole still remained loyal to the stage and small screen. In 1998, a role in the acclaimed HBO miniseries From the Earth to the Moon found him going as strong as ever, and on the heels of supporting roles in A Simple Plan and I'll Be Home for Christmas, Cole played what was perhaps his most widely recognized role to date in Office Space (1999). Cast as by-the-books corporate figurehead William "Bill" Lumbergh, Cole delivered a performance that was pure comic gold for anyone who has weathered the never-ending drone of life in cubicle-land. In 2001, Cole loaned his voice to the hit "Adult Swim" cartoon Harvey Birdman, Attorney at Law, playing several characters, including Birdman himself. The next year, Cole continued to dabble in animated television with his performance as the titular character's father in the hit series Kim Possible. Back on the big screen, he took the role of the villainous heavy in the Eddie Murphy/Owen Wilson comedy I Spy and returned to the role of Mike Brady in the made-for-television sequel, The Brady Bunch in the White House. In 2003, he was cast in the recurring role of new Vice President "Bingo Bob" Russell for the fifth season of the critically acclaimed dramatic series The West Wing. The popular character actor could also be seen in supporting capacity in the 2004 comedies Win a Date with Tad Hamilton! and Dodgeball: A True Underdog Story.Cole maintained his status as a talented comic with a series of vocal performances on the animated television show The Family Guy, while showcasing his versatility by appearing in the sequel to the American version of The Ring. In 2006 he played opposite Will Ferrell in the NASCAR comedy Talladega Nights: The Ballad of Ricky Bobby. He appeared in the spy drama Breach, and lent a scary presence to the pot comedy Pineapple Express. He became a part of the HBO series Entourage for that show's final two seasons, and in 2011 he was in the hit family comedy Hop.

Trivia: Los Angeles native Sasha Alexander honed her interest in acting with roles in school plays, but soon graduated to a professional career with roles on shortlived series like the drama Wasteland and the wild comedy Greg the Bunny, on which she shared an on-screen kiss with comedian Sarah Silverman. In 2003, Alexander took on the role of Agent Caitlin Todd on the series NCIS. She would play the role for many seasons to come, in addition to roles in movies like Yes Man and Love Happens, and other TV shows, like Rizzoli & Isles.

Trivia: Born in New York City on August 8th, 1968 and raised in Fairfield, CT, prolific film and television actor Michael Weatherly got his start on an episode of The Cosby Show before moving on to carve out an impressive career on screens both large and small. While many television viewers would recognize Weatherly from walk-on roles in such popular television series as Charmed and Ally McBeal, it was the actor's controversial age-disparity romance with Dark Angel co-star Jessica Alba that got tongues wagging around Tinseltown back in 2001. He could be seen opposite Alba on that sci-fi program throughout its two-season run (2000-2001). Later, Weatherly portrayed actor Robert Wagner in the made-for-television drama The Mystery of Natalie Wood before revealing a deeply personal secret about his onscreen girlfriend in Her Minor Thing. In 2003, Weatherly landed his most regular television role to date, as a Naval criminal investigator on NCIS.

Trivia: Born in Chile but raised in Miami, actress Cote de Pablo developed an impressive resumé on both stage and screen. In 2001, she appeared in a New York City Public Theater production of Measure for Measure, and in 2005, she made her Broadway debut in The Mambo Kings. In 2006, she joined the cast of the series NCIS, playing Mossad operative Ziva David. She made her big-screen in the western The Last Rites of Ransom Pride.

Trivia: Played clarinet in his high school band and sang in the choir. Theater debut was in a 1970 college production of Shakespeare's The Taming of the Shrew. Taught an acting class at the Georgia State Penitentiary in the early 1970s. Made his big-screen debut in the 1989 thriller Black Rainbow. Has had recurring roles as an inmate on Prison Break and a former Naval Criminal Investigative Service agent on NCIS.

Trivia: Grew up in Richmond, Virginia and danced professionally with the Richmond Ballet.Focused on French and Postcolonial works while studying Literature at Harvard University.Served as the publicity manager for the Hasty Pudding Theatricals in 2003.Is fluent in French.Appears in the music videos for Counting Crows' "You Can't Count on Me" and Bon Jovi's "What Do You Got?"

Trivia: After debuting as the friend of Winona Ryder's character in the sentimental weepie Autumn in New York (2000), actress Liza Lapira landed bit parts in Tony Scott's feature Domino (2005); guest appearances on such series as Grey's Anatomy, Monk, and Law & Order; and recurring roles on such shows as Huff, Law & Order: Special Victims Unit, and NCIS. In 2008, Lapira ascended to supporting billing with a plum role as MIT student-turned-gambler Kianna in Robert Luketic's thriller 21. In the years to come, Lapira would appear on shows like Dexter, Dollhouse, and Traffic Light, and in movies like Crazy, Stupid, Love.

Trivia: Going under the name Pauley P., actress Pauley Perrette (born March 27th, 1969) first gained notoriety with an extended arc on the acclaimed ABC drama Murder One. She followed that with guest spots on such shows as The Drew Carey Show and Frasier before landing a gig as a regular (using her full moniker) on the short-lived Party of Five spin-off Time of Your Life. After that series bowed, Perrette could be seen in small capacity in the big-screen hits Almost Famous and The Ring. In 2003, she finally landed in a series with staying power. This time it was the JAG spin-off Navy NCIS, a CBS drama that cast Perrette in a lead role alongside Mark Harmon.

Trivia: Born in 1996, Mary Matilyn Mouser built a career as a voice actor in films like Bambi II and the series Me, Eloise before gaining prominence in live-action projects. In 2007, she was cast as Mia on the CW family drama Life Is Wild. And though that particular series failed to take hold, Mouser still managed to remain a farmiliar fixture to television viewers by joining the cast of ABC's Body of Proof four years later.

Trivia: Lead actress, onscreen from the late '80s.