Nightbreed (1990)

Set up as the fall guy in a string of slasher murders, Boone decides he'll hide by crossing the threshold that separates "us" from "them" and sneak into the forbidden subterranean realm of Midian.

Directed by: Clive Barker

Starring: Craig Sheffer, Anne Bobby, David Cronenberg, Charles Haid, Hugh Quarshie, Hugh Ross

Links: IMDb, Movie posters, Movie stills