It's a wrong number for the callers who hook up with a homicidal brother and sister. Richard Hatch. Stacy: Shawn Weatherly. Seth: Leif Garrett. Angelina: Greta Blackburn. Capt. Barnes: Richard Roundtree. Henry: James O'Sullivan. Simmons: Terrence McGovern. Mrs. Simmons: Shelli Place. Alice: Tara Hutchins. William Webb directed.