Because you like Number Six in Battlestar Galactica

Protecting his family's name and its power are more important to Tywin Lannister than anything or anyone. See them in Game of Thrones.

Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.

A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.

Jack Bauer is a terrorist fighter who is scared of nothing and no one. The clock is ticking! See them in 24.

Relentlessly cheerful and optimistic, Erin Hannon is an office receptionist. See them in The Office.

This power-hungry Time Lord calls himself the "master of all." Bonus: he has 13 lives. See them in Doctor Who.

Green skin, pointy hat, evil cackle—this villain has it all! See them in The Wizard of Oz.

Hoban Washburne shows you can be a hotshot space pilot *and* play with dinosaurs. See them in Firefly.

Assistant to the demanding editor-in-chief, Emily Charlton comes across as cold and insensitive. But who can blame her? See them in The Devil Wears Prada.

Sometimes being a supportive girlfriend like Ophelia doesn't work out too well. See them in Hamlet.

There's magic behind Tara Maclay's quiet façade. See them in Buffy the Vampire Slayer.

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.