Trivia: Best known for playing Cdr. John Crichton on Farscape (1999-2003) and Lt. Col. Cameron Mitchell on Stargate SG-1 (2005-07). Family owns and operates NASCAR race cars. Wanted to be an astronaut while growing up. Studied at the Central School of Speech and Drama in London. Played Leonardo in a 1989 London production of The Merchant of Venice that starred Dustin Hoffman; in 1990, the production moved to Broadway. Made his movie debut with a small part in 1990's Memphis Belle. Had a recurring role on Party of Five as Sam Brody during the 1996-97 season. Was originally cast to play football coach Red Raymond on the CW drama Hellcats in 2010, but dropped out so he could focus on films.

Trivia: Dreamed of playing professional hockey as a teen. Studied business in college but switched to theater after failing a calculus course. Was inspired to pursue an acting career after seeing future Stargate SG-1 costar Richard Dean Anderson shoot a scene from MacGyver on a Vancouver beach. Performed at the Stratford Shakespeare Festival for two seasons. Met his wife, Lexa Doig, while guest-starring in an episode of her sci-fi series, Gene Roddenberry's Andromeda. Played hockey on the Stargate SG-1 team that competed against other productions, such as Smallville, that also shot in British Columbia.

Trivia: Parents wanted her to pursue a career in science. Appeared in stage productions of Steel Magnolias, Children of a Lesser God and Noises Off. First TV job was an appearance in a 1989 commercial for the Canadian coffee-and-doughnut chain Tim Hortons. In the early 1990s, cofounded the Canadian comedy group Random Acts, with Katherine Jackson and Anne Marie Kerr. Won a Canadian Comedy Award for Best Actress in the 2006 film Breakdown. Received Gemini Award nominations for her work on Stargate SG-1 (2001) and Sanctuary (2009). The Gemini Awards honor excellence in Canadian TV.

Trivia: Played football for the University of Oregon. Had guest-starring roles on MacGyver and The Fresh Prince of Bel-Air before becoming a regular on Sirens. Voiced characters in the series X-Men: Evolution and Action Man. Wrote four episodes of Stargate SG-1 while appearing on the series as Teal'c.

Trivia: The son of actor Lloyd Bridges, Beau Bridges (born Lloyd Vernet Bridges III) was actually named for his father; the nickname "Beau" was borrowed from Ashley Wilkes' son in Gone With the Wind. Beau received good billing for his secondary juvenile role in The Red Pony in 1949, although he was primarily seen in bit parts during the late '40s. This suited him fine; not all that interested in films, young Bridges had aspirations of being a basketball star. Despite being only 5'9", he played on the U.C.L.A. basketball team and at the University of Hawaii. But realizing that his height would always hold him back in professional sports, Bridges returned to acting via a small role on his father's TV series Sea Hunt. He made his stage debut in 1966's Where's Daddy and continued appearing in leading film roles throughout the 1960s and '70s, easing into character leads. Bridges directed two feature films, The Wild Pair (1987) and Seven Hours to Judgment (1988), in addition to the TV special The Thanksgiving Promise, in which virtually the entire Bridges clan (including his mother Dorothy) was cast. Bridges received Emmy and the Golden Globe awards for his portrayal of the title character in the 1992 TV movie Without Warning: The James Brady Story (1991), and won awards for his participation in the gloriously-titled made-for-cable The Positively True Adventures of the Alleged Texas Cheerleader-Murdering Mom (1993). He would continue to appear prominently both on the big and small screens over the coming decades, on shows like The Agency and Stargate: Atlantis and in films like The Good German and The Ballad of Jack and Rose.

Trivia: Enrolled in college, but quit after only three weeks in order to concentrate on acting. An action figure was created for Aeryn Sun, the character she played on Farscape from 1999 to 2003. Won a Saturn Award for Best Actress in 2004 for Farscape: The Peacekeeper Wars. Had a recurring role on ninth season of Stargate SG-1 before joining the cast a series regular for the 10th and final season; she later reprised her role in two direct-to-DVD films.

Trivia: After graduating from Yale drama school in 1988, bookish actor Joshua Malina was cast in Aaron Sorkin's Broadway production of A Few Good Men and began a collaboration that would span decades. Malina had his first film role in the 1993 Hollywood adaptation of Sorkin's play and also appeared in the Sorkin-penned romantic drama The American President. A few small roles followed -- notably a part in 1998's Bulworth and a multiple-episode stint on HBO's The Larry Sanders Show -- before Sorkin came calling again in 1998, casting Malina as one of the leads in the critically acclaimed ensemble show Sports Night.Despite awards and a loyal cult-following, Sports Night was canceled after only two seasons. Meanwhile, another Sorkin-produced prime-time drama quickly became a hit with both critics and audiences. Though Malina wasn't part of the cast of The West Wing when it premiered in 1999, he joined up in 2002 to fill the void left by the departing Rob Lowe. Malina remained with The West Wing throughout its run, which ended in 2006, but wasted no time before landing another TV gig. In 2007, he was cast alongside former Alias star Michael Vartan in the ABC corporate drama Big Shots. After a five-year hiatus from the big and small screens, he took a small part in Jonathan Kasdan's The First Time.