Because you like Emmett Brown in Back to the Future

Carol Peletier's credo: your strength comes from who you are, not who you used to be. See them in The Walking Dead.

Elena Gilbert is the quintessential girl-next-door who gets involved with the new "boy" at school. See them in The Vampire Diaries.

Aerith Gainsborough has lived a simple life, but when the world is threatened she's willing to step up and do whatever she can to help. See them in Final Fantasy Series.

Jo Wilson is an accomplished doctor who's getting over her past. See them in Grey's Anatomy.

An undercover DEA agent, Max Payne is too focused on avenging the past to plan for the future. See them in Max Payne.

There must be quite a lot of fellows who haven't got anybody to bring them tea in the morning. Bertie Wooster is lucky to have his valet, Jeeves. See them in Jeeves and Wooster.

A debonair spy, Harry Hart is the epitome of a gentleman, even when he calmly takes down multiple men with a militarized umbrella. See them in Kingsman: The Secret Service.

Beautiful and artistic, Aria Montgomery follows her own path. See them in Pretty Little Liars.

Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.

Mac is a karate-chopping, beer-chugging schemer. See them in It's Always Sunny in Philadelphia .

Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.