The Big Bang Theory - "The Bat Jar Conjecture" - 01:00 am Saturday, November 15 on WPIX HDTV

Johnny Galecki (Actor) .. Leonard

Born: April 30, 1975
Birthplace: Bree, Belguim

Trivia: Born on a Belgian army base, curly brown-haired Johnny Galecki grew up in Chicago and started acting professionally at the age of 12. He made his feature film debut in 1988 as River Phoenix's little brother in A Night in the Life of Jimmy Reardon. He then assumed the role of Rusty Griswold in National Lampoon's Christmas Vacation, and gained his first regular role on a TV series as Robert Ulrich's son in American Dreamer. In 1991, he starred in the made-for-TV movie Backfield in Motion, co-starring the production team of Roseanne and Tom Arnold. The next year, Galecki joined the cast of Roseanne as Darlene's sensitive and put-upon boyfriend David Healy. He stayed on the show until its final season in 1997, although he wasn't on very much during its last few years. His other television credits include several guest appearances, leading roles in made-for-TV movies, and a part on the short-lived Head of the Class spin-off Billy. After Roseanne ended, he got back into features with small parts in I Know What You Did Last Summer, Bean, and Suicide Kings. He continued playing slightly effeminate sensitive males in The Opposite of Sex and Morgan's Ferry. After bit parts in Bounce, Playing Mona Lisa, and Vanilla Sky, Galecki played a leading role in the comedy thriller Bookies, which premiered at the 2003 Sundance Film Festival. In 2007 he landed the leading role in the sitcom The Big Bang Theory and it grew to be one of the most popular shows on TV, earning Galecki Emmy, Golden Globe, and Sag nominations in 2011 for his work on the show. He maintained his movie career in projects such as Hancock and In Time.

Jim Parsons (Actor) .. Sheldon

Birthplace: Houston, TX

Trivia: First noticed by many viewers as Tim -- the Klingon-spouting "knight in training" involved with the mother of Mark (Peter Sarsgaard) in Zach Braff's gently observed comedy drama Garden State (2004) -- American actor Jim Parsons moved from this memorable debut into a sequence of periodic roles in U.S. features. These included Chris Terrio's urban ensemble drama Heights (2004), opposite Glenn Close and Elizabeth Banks, and Brad Silberling's comedy drama 10 Items or Less (2006), opposite Morgan Freeman and Paz Vega. His breakout success came when he was cast as uber-nerd Sheldon on The Big Bang Theory. His work on that show led to him scoring an Emmy win for Outstanding Lead Actor in a Comedy Series, and helped him earn small parts on the big screen in The Big Year and The Muppets.

Kunal Nayyar (Actor) .. Rajesh Koothrappali

Born: April 30, 1981
Birthplace: London, England

Trivia: Actor Kunal Nayyar first made a splash in Hollywood playing physicist Koothrappali on the series The Big Bang Theory, which debuted on CBS in 2007. In 2012 Nayyar voiced the character of Gupta in Ice Age: Continental Drift, and the following year he could be seen opposite Gina Gershon and Billy Campbell in the thriller, The Scribbler. In addition to his feature work Nayyar also co-wrote the critically acclaimed play Cotton Candy, which runs in New Delhi.

Adam Gregor (Actor) .. Dimitri

Carol Ann Susi (Actor) .. Mrs. Wolowitz

Born: February 02, 1952
Died: November 11, 2014

Vernee Watson-Johnson (Actor) .. Althea

Born: January 14, 1954
Birthplace: North Trenton, New Jersey, United States

Trivia: Enrolled into dancing school when he was 4-years-old.Decided to pursue a career in acting while she was still in high school.At the age of 17, joined the renowned Al Fann Theatrical Ensemble.Made her debut as an actress on screens in tv commercials.Has provided her voice to several animations over the years for Warner Bros and Hanna-Barbera Productions.Is an acting coach.

James Hong (Actor) .. Chen

Born: February 22, 1929
Birthplace: Minneapolis, Minnesota, United States

Trivia: Actor James Hong was working as a nightclub comic in San Francisco and Hawaii when he was tapped for his first regular TV role: "Number One Son" Barry Chan in the Anglo-American co-production The New Adventures of Charlie Chan (1957). Hong would later appear as Frank Chen in Jigsaw John (1976) and Wang in Switch (1977-78). In theatrical features, he played characters bearing such flavorful monikers as Chew, Lo Pan and Bing Wong. He was seen as Faye Dunaway's butler in Roman Polanski's Chinatown (1974), repeating the role (minus Faye) in the 1990 sequel The Two Jakes. One of his most sizeable screen roles was Lamont Cranston's brainy assistant Li Peng in The Shadow (1994). James Hong has also directed a brace of feature films, including 1979's The Girls Next Door and 1989's The Vineyard.

Mark Cendrowski (Actor)

Born: August 05, 1959

Trivia: Childhood friend with actor and comedian Dave Coulier.In 1980, established University of Michigan's first comedy club along with his wife Cindy.Began his career as stage manager and assistant director.In 1986, joined the Directors Guild as a stage manager.Worked with Johnny Galecki on Roseanne and Kaley Cuoco on 8 Simple Rules before The Big Bang Theory.Has two children with wife Cynthia Glazar.Is a regular visiting professor at the University of Michigan.

Lee Aronsohn (Actor)

Born: December 15, 1952

Trivia: In 1975, moved to Lincoln, Nebraska, where he opened a comic book and record store.When he moved to Los Angeles, he tried stand-up comedy before starting a career as a writer.Named the character of Vicki, the illegitimate daughter of Captain Stubing in The Love Boat, after his childhood pet dog.Wrote the original music for Two and a Half Men.His film 40 Years in the Making: The Magic Music Movie (2017) took him 2 and a half years to make.

Chuck Lorre (Actor)

Born: October 18, 1952
Birthplace: Plainview, New York, United States

Trivia: Began his career as a touring singer and songwriter. Wrote for animated series until getting his big break as a supervising producer for the sitcom Roseanne. Wrote the Deborah Harry 1980s hit "French Kissin' in the USA." Co-composed the soundtrack for the 1980s television series Teenage Mutant Ninja Turtles. Received a star on the Hollywood Walk of Fame in 2009. Four of his shows — The Big Bang Theory, Mike & Molly, Mom and Two and a Half Men — were all in the Top 20 primetime programs during the week of January 27-February 2, 2014. Received an honorary doctoral degree from the State University of New York at Potsdam. Is known for his vanity cards (run during the end credits of his series) in which he shares his thoughts about life.

Bob La Masney (Actor)

Kristy Cecil (Actor)

Bill Prady (Actor)

Born: June 07, 1960
Birthplace: Southfield, Michigan, United States

Trivia: Began his career as a writer for Jim Henson. Was a California gubernatorial candidate in 2003. Worked as a programmer at a software company. Earned a Writer's Guild of America Award for the 1991 tribute special The Muppets Celebrate Jim Henson.

Charlie McDaniel (Actor)

Peter Chakos (Actor)

Robert Cohen (Actor)

Bruce Peterson (Actor)

Michael Kreple (Actor)

Stephen Engel (Actor)

Jennifer Glickman (Actor)

David Goetsch (Actor)

David Little (Actor)

Steven Molaro (Actor)

Faye Oshima Belyeu (Actor)

Mary T. Quigley (Actor)

Melissa Rauch (Actor)

Born: June 23, 1980
Birthplace: Marlboro, New Jersey, United States

Trivia: Began her career as a comedian and had a one-woman show, The Miss Education of Jenna Bush, in which she played the daughter of former president George W. Bush. Co-wrote, directed and starred in the comedic short The Condom Killer. Toured with the political-satire group Gross National Product. Performs with The Realest Real Housewives show, in which comedians read transcripts from the Real Housewives franchise. Was a recurring guest star on series 3 of The Big Bang Theory before joining the cast as a series regular in series 4.

Mayim Bialik (Actor)

Born: December 12, 1975
Birthplace: San Diego, California, United States

Trivia: Name means "water" in Hebrew. Had her big break in the 1988 film Beaches, playing the younger version of Bette Midler. Appeared in the music video for Michael Jackson's "Liberian Girl." Made her television debut in the 1980s fantasy series Beauty and the Beast. Best known for her role as the title character in the sitcom Blossom. Was successful in many voiceover roles in animated series, including Kim Possible and Hey Arnold! Appeared on a 2009 episode of What Not To Wear. Her The Big Bang Theory character, Amy Farrah Fowler, is a neurobiologist, corresponding to Bialik's real-life degrees in neuroscience. Is a spokesperson for the Holistic Moms Network and gave birth to her second son at home.

Aarti Mann (Actor)

Born: March 03, 1978

The Big Bang Theory: The Bat Jar Conjecture

01:00 am - 01:30 am, Saturday, November 15 on WPIX HDTV (11.1)

The Bat Jar Conjecture

Season 1, Episode 13