Because you like Number Six in Battlestar Galactica

Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.

Samantha Jones is a try-sexual who'll try anything once. See them in Sex and the City.

Despite the war-torn world around him, Mal Reynolds still holds onto the shred of hope that life can be more than just living another day. See them in Firefly.

Faith has a chip on her shoulder and a stake in her hand to slay vampires in her town. See them in Buffy the Vampire Slayer.

Anya Jenkins has a real harsh bark to go with her demonic bite. See them in Buffy the Vampire Slayer.

Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.

It's impossible to say whether Winifred Burkle is cuter than she is smart, or vice versa. See them in Angel.

Don't tell anyone Kate Austen was under arrest when the plane crashed. See them in Lost.

Jenny Flint is a devoted wife and daring crime fighter, which is pretty unconventional for a Victorian maid. See them in Doctor Who.

A blood-thirsty warrior on the battlefield, Ragnar Lothbrok is a dedicated family-man at home. See them in Vikings.

Helena is a mentally unstable, childish, and completely merciless. And most of all, she's an unstoppable killer. See them in Orphan Black.

Blunt but anxious, Gretchen Ross bonds most easily with those who have lived tough lives like she has. See them in Donnie Darko.