Because you like Billy Costigan in The Departed

Rupert Giles is a librarian on the outside, fearless evil-fighter on the inside. See them in Buffy the Vampire Slayer.

A premier member of the leather cat-suit club, Selene can chill you with a stony look, or ice you with her ninja moves. See them in Underworld.

A Berlin-based locksmith by day, Wolfgang Bogdanow is a world-class thief by night. He can also see out of other people's eyes, but that's a different issue. See them in Sense8.

CIA operative Carrie Mathison is on a self-assigned mission to follow a lead, whether it be the truth or just her delusions playing tricks. See them in Homeland.

Freelance writer Diane is dating a dog and writing a memoir of a horse. See them in Bojack Horseman.

Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.

This isn't the Captian Hook of your nightmares; he's charming and devilishly handsome. See them in Once Upon a Time.

Manipulative, conniving, and ruthless, Mr. Gold is enigmatic no matter what world he's in. See them in Once Upon a Time.

A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.

Bucky Barnes used to be a good-hearted American soldier. Now he's the cold-hearted Winter Soldier. See them in Marvel Cinematic Universe.

Cynical, judgmental, and hipper-than-thou, Enid Coleslaw wears her outsider status like a badge of honor. See them in Ghost World.

A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.