From Sheldon's (Jim Parsons) eccentric antics to Leonard's (Johnny Galecki) outrageous escapades, the show's funniest ...

The Big Bang Theory made science funny without trying too hard ... Penny starts a small side hustle making flower clips by hand. The guys offer to help and quickly turn it into a production ...

This Big Bang Theory episode is filled with Sheldon's signature physical comedy and the gang's lack of social skills. When Penny gifts Sheldon a napkin used and autographed by actor Leonard Nimoy ...

After 12 seasons, The Big Bang Theory came to a close on Thursday night ... is the longest-running multi-camera series in TV history — aired a funny, yet emotional goodbye.