In which film did Bill Murray play the character Dr. Peter Venkman?

Bill Murray played Dr. Peter Venkman in the 1984 film Ghostbusters.

Venkman is one of three eccentric parapsychologists who turn their research into a ghost-catching business in New York City. He is the team's smooth-talking skeptic, alongside Ray Stantz, played by Dan Aykroyd, and Egon Spengler, played by Harold Ramis.

Ghostbusters blended supernatural horror, science fiction, and comedy under director Ivan Reitman. The film became a major cultural phenomenon, with its proton packs, Ecto-1 ambulance, Stay Puft Marshmallow Man, and Ray Parker Jr.'s theme song becoming instantly recognizable. Murray's sarcastic, improvisational performance made Venkman the franchise's most prominent comic personality.

A common mix-up is confusing the 1984 original with Ghostbusters II or the later sequels. Murray reprised Venkman in those films as well, but the first film introducing the character—and the canonical answer to this question—is Ghostbusters.