20 Amazing TV Plot Twists You Wish You Could Relive

20. Invincible - Omni-Man Is The Villain

Ending the pilot on a tantalizing cliff-hanger is a foolproof way to hook viewers in a show. Did Invincible do this? Oh yes. 

This animated superhero saga revolves around Mark Grayson / Invincible (Steven Yeun), a young superhero slowly growing into his role under the guidance of his father Omni-Man (JK Simmons)... tragically unaware that his father is anything but a hero. Viewers, on the other hand, learn this in the most brutal way imaginable at the end of the show's first episode, where Omni-Man abruptly massacres a team of superheroes in a grotesquely violent sequence that'll leave even the hardest viewers feeling queasy. 

It was a bold choice to do the big reveal so early in the season, yet it paid off in spades. The other characters being unaware of Omni-Man's true nature gave the season a great helping of dramatic irony and set the stage for a bruising, emotional finale in which Omni-Man finally revealed to his son that he's on a mission to conquer Earth, leading to a gory and gruelling showdown between father and son.