Because you like Emmett Brown in Back to the Future

Katsa is a strong-willed young woman with a deadly skill set. See them in Graceling .

Bo Dennis once dreamed of being prom queen, but then she found out that she's part of some ageless secret race that feeds on humans. See them in Lost Girl.

All of Tate Langdon's obsessions are dangerous. See them in American Horror Story.

Clary Fray's philosophy: dive into the supernatural underworld first and ask questions later. See them in City of Bones.

Tony Mendez is quietly determined and creatively resourceful. See them in Argo.

Mike Lane is magnetic, beefy, and street-smart, but how long can he keep up with the red-light scene? See them in Magic Mike.

Other people's opinions have never mattered much to Haruka Nanase, and they aren't going to start to do so now. See them in Free! Iwatobi Swim Club.

Amy Townsend rarely wakes up in the same bed twice. See them in Trainwreck.

Smart, sarcastic, and loyal, Stiles Stilinski doesn't just want to be the sidekick in someone else's life. See them in Teen Wolf.

When the going gets tough, Dre Johnson gets tougher. Well, he'd like to think he does. See them in Blackish.

As Jane Villanueva grapples with a truly unexpected pregnancy, she realizes that her life is "now the stuff of telenovelas." See them in Jane the Virgin.

Kinsey Locke is always ready to take it to the limit. See them in Locke & Key.