Filmography from William P Mcgivern

Writer :

I Saw What You Did, William Castle, 1965
When two teenagers make prank phone calls to strangers, they become the target for terror when they whisper "I Saw What You Did, And I Know Who You Are!" to psychopath Steve Marek (John Ireland) who has just murdered his wife. But somebody else knows of the terrible crime that was committed that night, the killer's desperately amorous neighbour Amy Nelson (Joan Crawford)....