Watch online: NetFlix.
Summary: A pretty good suspense movie. Harry Caul is a middle-aged surveillance expert records a conversation between a couple. Based on his recording, he feels that the couple is about to be harmed. His conscience tugs at him. In his private and professional life, Harry Caul is a solitary man who operates alone and does not share hsi secrets with anybody. The movie is interesting for its twists and turns. Gene Hackman is the surveillance expert. His acting is awesome.