Because you like Harold Finch in Person of Interest

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.

Rupert Giles is a librarian on the outside, fearless evil-fighter on the inside. See them in Buffy the Vampire Slayer.

Tina Cohen-Chang is a shy loner who becomes a fierce performer on stage. See them in Glee.

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

Both a noble district attorney and a psychopathic villain, Harvey Dent proves some men really can have it all. See them in DC Extended Universe.

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

David Rossi may chase serial killers for a living, but he's more interested in what wine pairs well with tonight's parmigiana. See them in Criminal Minds.

A consummate schemer with a knack for solving mysteries, Shawn Spencer has trouble taking anything seriously. See them in Psych.

A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.

Jeff Winger thinks he's too cool for school, which is a problem because he just enrolled in community college. See them in Community.

A reclusive introvert, Liz Sherman has a temper that's literally lethal. See them in Hellboy.

His name is Inigo Montoya and whoever killed his father should be prepared to die. See them in The Princess Bride.