The Hand (1981) on Netflix

The comic book writer and cartoonist Jonathan "Jon" Lansdale is the creator of the successful hero "Mandro" and lives with his wife Anne Lansdale and their daughter Lizzie in the countryside. Anne wants to move to New York and has an argument with Jon while driving on the road. She distracts with an impatient driver and has a car accident with a truck where Jon loses his right hand. The hand is not found and Jon needs to use prosthesis. They move to New York and his editor Karen Wagner offers another cartoonist to proceed with "Mandro". However Jon is not happy with the modifications introduced in his character by the new cartoonist and Karen let him go. Without money, Jon moves to California to teach in a college while Anne and Lizzie stay in New York for a few more months. Jon has a love affair with his student Stella Roche and he feels attracted by her. However when his colleague Brian Ferguson tells that Stella is an easy woman, Jon does not want to see her. However, his severed hand kills Stella and when Brian tells that he is going to the police to report that Stella is missing, his hand also kills him. Meanwhile Anne and Lizzie come to his house to spend Christmas with him. Soon he learns that Anne is betraying him and that she intends to go to Los Angeles with Lizzie. Out of the blue, his hand tries to strangle Anne and Jon follows it. Is it possible that the hand does exist to kill whoever anger him?