Dial M for Murder

In 1954, Alfred Hitchcock released Dial M for Murder, starring Ray Milland, Grace Kelly, and Robert Cummings. The movie is a suspense thriller centered on a love triangle between Tony (Milland) and his wife, Margot Wendice (Kelly) and Mark Halliday (Cummings). Tony finds out about Margot and Marks affair when he discovers a letter written by Mark in Margot’s handbag. Tony steals the letter out of curiosity and then blackmails his wife as a first step into plotting to kill her.

Motivated by jealousy and greed, Tony develops a plan to have someone murder Margot for him. He blackmails Swan, an old classmate, into agreeing to murder his wife. The night Margot is to be killed Tony establishes his alibi. He goes to a steak party with Mark while Swan enters into their house and hides behind the curtains waiting for Margot to pick up the phone. Tony phones home at a specific time. When Margot picks up the phone she is attacked from behind. Swan attempts to strangle her with a scarf. But earlier Margot had left a pair of scissors on the desk. She stabs Swan with them and he dies.

Although Tony's plan was ruined he quickly improvised and covered up Swan's mistakes. Chief Inspector Hubbard (John Williams) enters the investigation. Margot is then charged and convicted of murdering Swan. Hubbard is a clever inspector that has an intuition that Margot is innnocent. Hubbard then comes up with a plan to catch Tony red handed.

Netflix has the movie available for rent.