Because you like Alex P. Keaton in Family Ties

Galina Reznikov is the head chef of prison, cooking up meals as well as storms on anyone who dares to cross her; even the guards are terrified of her. See them in Orange Is The New Black.

Sam Montgomery works hard, but her evil stepmother makes sure her efforts don't pay off. See them in A Cinderella Story.

A soulful bass player, Nick O'Leary can't stop sending breakup CDs to his ex. See them in Nick and Norah's Infinite Playlist.

Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.

Beneath Lena Duchannes' prickly exterior lurks a sensitive, compassionate soul. See them in Beautiful Creatures.

Kesuke Miyagi is a karate expert who thinks the best way a scrawny high schooler can learn how to defend himself is by washing every surface in sight. See them in The Karate Kid.

Matt Flamhaff is not too concerned about being part of the popular crowd. Too bad his best friend is. See them in 13 Going on 30 .

Frederick Frankenstein is an eccentric (O.K., maybe a little insane) professor who is excited to be delving into his family's past. See them in Young Frankenstein.

Summer Roberts is privileged and preppy but also surprisingly open-minded and fiercely loyal. See them in The O.C..

A loyal assistant to Nelson and Murdock, Karen Page has a way of finding trouble. See them in Marvel Cinematic Universe.

A singing nanny, Mary Poppins is practically perfect in every way. See them in Mary Poppins.

James Wilson is a compassionate doctor who willingly plays the sidekick. See them in House M.D..