10 More TV Secrets That Were Hiding In Plain Sight

10. Maggie Doesn't Back Down From Mr. Burns - The Simpsons

Without doubt one of the greatest whodunnit tales in TV history, the mystery surrounding exactly who shot Mr. Burns at the beginning of The Simpsons' seventh season was actually secretly hinted at during the sixth season's finale.

As the despicable Mr. Burns steals Springfield Elementary School's oil and threatens to block out the sun, this horrible figure eventually shows up at a town hall meeting talking about his actions and arrogantly asks all in attendance "who here has the guts to stop me?"

Burns would be gunned down not long after, of course. But the identity of the person who did the firing was very much suggested in the shot that followed Burns' question here.

While everyone else watching on looks away after questioning whether they do have the guts to stand up to the villainous nuclear power plant owner, Maggie Simpson shoots an angry stare through Burns' head.

A whole episode before it would be revealed that this child pulled the trigger in response to Burns taking candy from a baby, this secret clue was sitting right there in Marge's arms.