The Big Bang Theory - The Euclid Alternative - 10:00 am Thursday, March 5 on TLC

Johnny Galecki (Actor) .. Leonard Hofstadter

Born: April 30, 1975 in Bree, Belgium

Best Known For: Playing Leonard in The Big Bang Theory.

Early-life: Born John Mark Galecki on April 30, 1975, in Bree, Belgium. His mother was a mortgage consultant and his father was in the US air force, before becoming a rehab teacher for blind war veterans. The family moved back to America when Johnny was three. He got his first acting role in 1987, in the made-for-TV movie Time Out for Dad, which was the first of several bit parts in a variety of TV projects. Johnny debuted on the big screen as River Phoenix's brother in A Night in the Life of Jimmy Reardon in 1988.

Career: Four years later, he landed what would become his big break - the role of David in hit comedy series Roseanne. He played the articulate but unworldly lad for five years. This led to a series of similar parts, this time on the big screen, in movies such as I Know What You Did Last Summer and The Opposite of Sex. His CV also includes appearances in Vanilla Sky, My Name is Earl, Hancock and Table for Three. In 2006, he took to the stage in a Broadway production of The Little Dog Laughed (which also featured his first nude scene). He returned to the small screen for the sitcom The Big Bang Theory.

Quote: 'Right now, I'm very healthy. I have no vices left. Except sugary breakfast cereal. And absinthe, of course.'

Trivia: In 2014, he was reportedly earning $1million per episode for The Big Bang Theory.

Jim Parsons (Actor) .. Sheldon Cooper

Born: March 24, 1973 in Houston, Texas

Best Known For: Playing Sheldon Cooper in The Big Bang Theory.

Early-life: Born James Joseph Parsons on March 24, 1973 in Houston, Texas. Jim was determined to become an actor from the age of six, after performing as the Kola-Kola bird in a school production of The Elephant's Child. After graduating from high school, he studied for a bachelor's degree at the University of Houston. He was accepted onto a two-year course in classical theatre at the University of San Diego in 1999 and, after graduating in 2001, he moved to New York.

Career: Early in his career, Parsons worked on Off-Broadway productions and appeared on TV several times. He had a recurring role on Judging Amy, appeared on the TV series Ed and had minor roles in such films as Garden State (2004) and School for Scoundrels (2006). His big break came when he landed the role of Sheldon Cooper in The Big Bang Theory, a role that earned him four Primetime Emmy Awards for Outstanding Lead Actor in a Comedy Series and a Golden Globe for Best Performance by an Actor in a Television Series - Comedy or Musical. He went on to appear in the films The Big Year (2011), The Muppets (2011), Home (2015) and Hidden Figures (2016).

Quote: 'Every time I think about writing, comedy doesn't interest me in the slightest. I can play comedy, but I don't think in terms of comic dialogue.'

Trivia: He took piano classes for 14 years.

Kaley Cuoco (Actor) .. Penny

Simon Helberg (Actor) .. Howard Wolowitz

Kunal Nayyar (Actor) .. Raj Koothrappali

Octavia Spencer (Actor) .. Octavia

Born: May 25, 1970 in Montgomery, Alabama

Best Known For: The Help.

Early-life: Octavia Lenora Spencer was born in Montgomery, Alabama, on May 25, 1970. She has six siblings. Octavia went on to study drama at Auburn University in Alabama. At the age of 19, she worked as an intern on the set of the film The Long Walk Home. She made her film acting debut as a nurse in A Time to Kill (1996).

Career: Spencer has made guest appearances in a number of TV shows, including ER, Chicago Hope, Roswell, The X-Files, Becker, Malcolm in the Middle and Dharma and Greg. She is best known for playing domestic Minny Jackson in The Help (2011), a role that earned her an Oscar and a Golden Globe. More recently, she has starred in Fruitvale Station (2013), Snowpiercer (2013), Get on Up (2014), Black and White (2014) and Insurgent (2015). She had a recurring role in the sitcom Mom.

Quote: 'You cannot live to please everyone else. You have to edify, educate and fulfil your own dreams and destiny, and hope that whatever your art is that you're putting out there, if it's received, great, I respect you for receiving it. If it's not received, great, I respect you for not.'

Trivia: Between 1996 and 2013, Spencer played a nurse 16 different times.

Elena Campbell-Martinez (Actor) .. Maria

Livia Trevino (Actor) .. Lourdes

Mark Cendrowski (Director)

Lee Aronsohn (Writer)

Dave Goetsch (Writer)

The Big Bang Theory: The Euclid Alternative

10:00 am - 10:30 am, Thursday, March 5 on TLC (12)

About this Broadcast

The Euclid Alternative
Season 2, Episode 5

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