Without Warning (1980)
Martin Landau's character is named after the Humphrey Bogart character in this film.
Some scenes of this movie are inspired by 'Texas Chain Saw Massacre, The (1974)'.
Poster glimpsed several times in hallway of movie producer
Poster on Steve's wall
Poster seen on wall.
A U.S. theatrical trailer is featured under the title 'It Came Without Warning'.
Making of Featurette