Because you like James T. Kirk in Star Trek

Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.

World domination and Superman's demise are next on Lex Luthor's to-do list. See them in DC Extended Universe.

Yippee-ki-yay! John McClane doesn't go down without a fight. See them in Die Hard.

A good-natured and academically minded superhero, Dan Dreiberg can still get his hands dirty in a fight. See them in Watchmen.

A conflicted small-town preacher, Jesse Custer leaves an unexpectedly bloody path in his wake. See them in Preacher.

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

Tony Mendez is quietly determined and creatively resourceful. See them in Argo.

Sylar's victims are found all over the country, many with their brains removed. See them in Heroes.

Ellen Ripley defines the word "badass." When she's not leading her crew on an interstellar voyage, she's slaying terrifying creatures. See them in Alien.

This android may not have emotions, but Lt. Commander Data's curiosity about humanity is endless. See them in Star Trek: The Next Generation.

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

Lois Lane's journalistic success is the result of her tenacity. She will doggedly pursue her leads until discovering the information she needs. See them in DC Extended Universe.