Curtis Harrington Director Anthony Perkins Allan Actor Julie Harris Katherine Actor Joan Hackett Olive Actor Kent Smith Raymond Actor Robert H. Harris Dr. Ellins Actor Billy Bowles Harold Dennis Actor Trent Dolan Eric Actor Kenneth Lawrence Allan as a child Actor Jeanette Howe Katherine Actor Molly Dodd Inmate Actor George Edwards Producer Aaron Spelling Executive Producer Fleet Southcott Cinematographer Richard W. Farrell Film Editing Laurence Rosenthal Original Music Tracy Bousman Art Director Ken Swartz Set Decoration Robert Harris Sr. Costume Design Jerrie Woods Costume Design