Because you like Doogie Howser in Doogie Howser, M.D.

A talented OBGYN, Addison Montgomery is trying to figure out the whole love and marriage thing. See them in Grey's Anatomy.

There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.

A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.

Merry Brandybuck is a troublemaking hobbit with a brave streak that some might call foolhardy. See them in The Lord of the Rings.

Jasper Jordan is trying his best to make it through the night. See them in The 100.

If this slick ad man doesn't like the conversation, he changes it—while drinking and smoking. See them in Mad Men.

Cosmo Kramer is an eccentric schemer whom you might know better as the "Assman." See them in Seinfeld.

Veronica Mars is a sarcastic private eye whose biggest mission is surviving high school. See them in Veronica Mars.

As the unit chief of the FBI's Behavioral Analysis Unit, Aaron Hotchner is dead serious about avenging dead people. See them in Criminal Minds.

Call her. Beep her. If anyone's in trouble, Kim Possible is there. See them in Kim Possible.