Because you like Donna Noble in Doctor Who

The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.

Quint is a grizzled shark hunter with a love of the sea. See them in Jaws.

An all-business doc , Miranda Bailey dispenses tough love to the interns she trains. Emphasis on "tough." See them in Grey's Anatomy.

For Jack Pearson, the best thing about having triplets is giving three times the love. See them in This Is Us.

As an undercover cop, Schmidt is getting to relive high school as a cool kid. See them in 21 Jump Street.

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.

George Costanza is short, stocky, bald, neurotic, and the self-proclaimed "king of the idiots." See them in Seinfeld.

Margo loves mysteries so much that she becomes one. See them in Paper Towns.

Tiffany Maxwell wishes people would stop reminding her about her dead husband. See them in Silver Linings Playbook.

Dimitri Belikov is a stoic vampire guardian who has the reserve, focus, and discipline of a soldier. See them in Vampire Academy .

Is there more to life than being really, really, ridiculously good looking? Derek Zoolander thinks not. See them in Zoolander.

Aldous Snow is a rock star who plays hard and parties harder. See them in Get Him to the Greek.