All of us were frightened about the final destiny of Zoe in the second season of House of Cards. But after the scene I was wondering... how could Frank escape from the crime scene without any witnesses (cameras or security systems)? The subway station wasn't empty and it seems nobody tried to do something but declared it as "accident" (in the news). I know that they were in a blind spot, but still, for me, it is not very realistic that nobody noticed a suspicious person running away.
I've only watched the first episode.