Continuity mistake: When Molly (Sandra Dee) grabs the letters she had hidden in the suitcase under the bed, her dress is still unzipped in the back. After ranting at her mother for having read the letters, she throws them into the fireplace, only now her dress is completely zipped up.
A Summer Place (1959)
1 mistake
Directed by: Delmer Daves
Starring: Arthur Kennedy, Richard Egan, Dorothy McGuire, Sandra Dee
Helen Jorgenson: Get that disinfectant bag and clean this bathroom. Don't forget the toilet seat.
Molly Jorgenson: I'm... I'm sure everything's clean, mother.
Helen Jorgenson: You can never be too sure.