Although The Big Bang Theory ’s Leonard was central to the show's success, some of the show’s most underrated moments prove its best relationship was platonic.

Smash-hit "The Big Bang Theory" is coming to an end after more than a decade on the air. We rounded up some of the best moments from the series.

Leonard (Johnny Galecki) and Penny (Kaley Cuoco) are The Big Bang Theory's core couple. Sheldon (Jim Parsons) and Amy (Mayim Bialik) and Howard (Simon Helberg) and Bernadette (Melissa Rauch) may ...

Howard's letter, Penny's declaration of love, as well as Sheldon and Amy's big step forward, highlight a season filled with watershed moments.

In addition to being referenced in Sheldon’s inventive “Rock Paper Scissors Lizard Spock,” one of The Big Bang Theory ‘s most beloved moments also featured Nimoy.

This is it, folks. The Big Bang Theory has finally wrapped up 12 seasons, and it did so with several surprises and sweet moments fans will be talking about forever!

In The Big Bang Theory 's season 3 episode "The Einstein Approximation," Leonard Hofstadter (Johnny Galecki) received a call in the middle of the night from a security guard.

Many of their greatest moments are included in this video. But Penny's primary relationship isn't with Sheldon. It's with Leonard (Johnny Galecki), with whom she has another odd couple relationship.

The Big Bang Theory is one of everyone's favourite comedies at the moment, illustrated by the fact that last week, it became the first comedy of the season to be the week's most-watched prime-time ...