In this episode, Sheldon and Leonard encounter a ... Every season of The Big Bang Theory is now streaming on Hulu.

In this episode, the origins of all the relationships are revealed, making it unnecessary to start with The Big Bang Theory‘s pilot ... The event is full of laughs, and it also leads to some ...

Read more: The Transformation Of Mayim Bialik From Childhood To The Big Bang Theory This episode lands at the bottom of our list because, despite being the last Christmas-themed episode of "The ...