20 Amazing TV Plot Twists You Wish You Could Relive

House of Cards might've crashed and burned with its catastrophic final season, but it was really entertaining for quite a few years. It always made for a good binge-watch that was constantly subverting your expectations, although its greatest shock came early in the show's run. That was the death of Zoe Barnes. 

Zoe (Kate Mara) had been one of the most important characters in the first season. She'd formed a twisted alliance with Frank Underwood (Kevin Spacey); in exchange for him furthering her career, she'd been publishing damaging things he told her about his opponents. 

That said, their relationship became more antagonistic once she suspected (correctly) that he'd murdered someone else, and, in season two's premiere episode, Zoe and Frank meet at a subway station in order to try and resolve their differences. However, Zoe cannot quite let the question of Frank's crimes go, and she continues to press the issue, thus spelling her doom. 

A frustrated Frank disappears around a corner and Zoe follows him... only for him to turn her around and throw her in front of a metro train, ruthlessly killing her. As the train screeches to a stop and passers-by scream, the psychopathic Frank Underwood calmly walks away. 

Thanks to Carl Franklin's claustrophobic directing, the pounding musical score, and the excellent acting from Spacey and Mara, this is a tripwire-tense scene that concludes in the most brutal ways, making it easily the most memorable sequence from House of Cards' entire run.