Because you like Eric Foreman in House M.D.

Pengiuns, turtles, and all things scientific is where Sam's expertise lies. Girls are uncharted territory, but Sam is trying to branch out. See them in Atypical.

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

Kate Beckett is a no-nonsense policewoman with a nerdy side. See them in Castle.

A mercurial mathematician, Ian Malcolm has a passion for Chaos Theory. See them in Jurassic Park.

Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.

Viktor says that when you’re going to change the world, don’t ask for permission. See them in Arcane.

Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.

Whether it's a companion he’s failed or lingering guilt from the war, the Doctor can never truly let go of his past lives. See them in Doctor Who.

Greg Lestrade is gruff, loyal, and quietly competent. See them in Sherlock.

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

As Violet says, one day the city’s gonna respect her. See them in Arcane.

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