Jim Parsons is known the world over for his portrayal of Sheldon Cooper on The Big Bang Theory, but before joining the sitcom ...

The biggest speculation in The Big Bang Theory and Young Sheldon fandom is that Leonard Hofstadter, Sheldon's best friend, is potentially dead.

Young Sheldon's finale floated the idea that Leonard may be dead, but now The Big Bang Theory franchise is one step closer to solving the mystery.