Because you like Doogie Howser in Doogie Howser, M.D.

Cosima Niehaus loves exploring the unknown. Even her own DNA is a puzzle, waiting to be unlocked. See them in Orphan Black.

Adults call him troubled and kids call him crazy, but Donnie Darko is too busy following the instructions of a giant bunny rabbit to care. See them in Donnie Darko.

Mabel Pines loves sparkles, animals, friendship, and fun. See them in Gravity Falls.

A girl who grew up on stories, Meggie Folchart is as loyal and intrepid as one of her fictional heroines. See them in Inkheart.

Wanting more out of life, Pam Beesly has a job she isn't crazy about and is engaged to a guy she's not sure is "The One." See them in The Office.

A tough tomboy with a protective streak, Maximum Ride is a human-bird hybrid. See them in Maximum Ride.

Marty McFly is a skateboarder, aspiring rock star, and reluctant time-traveler. See them in Back to the Future.

Cher Horowitz may have a problem with hubris, but she looks utterly fabulous while learning a lesson about the dangers of meddling. See them in Clueless.

Though Ray Holt is a man of few words and even fewer smiles, he cares deeply about his precinct and detectives. See them in Brooklyn Nine-Nine.

Christopher Turk is bringing his A-game to his next big challenge: becoming a surgeon. See them in Scrubs.

He's a dedicated cop and a nice guy. But James Gordon is learning that Gotham is not a city for nice guys. See them in Gotham.

Causing mayhem practically since birth, rambunctious Fred Weasley plays pranks on his siblings and avoids school at all costs. See them in Harry Potter Series.