From "The Staircase Implementation" to "The Opening Night Excitation," these are the funniest episodes of The Big Bang Theory ...

The Big Bang Theory' is littered with fun, nerdy Easter eggs that even the show's biggest fans may have overlooked.

Not knowing what to expect, Sheldon buys baskets of bath items, hoping to return some of them based on Penny's gift. This Big Bang Theory episode is filled with Sheldon's signature physical comedy ...

After 12 seasons, The Big Bang Theory came to a close on Thursday night, with back-to-back episodes that wrapped up several long-running storylines Dave Quinn is a Senior Editor for PEOPLE.