Lost for 20 years due to a "paperwork error" by Paramount Pictures. Was tracked down in 1992.
This was going to be Roman Polanski's next directorial effort. However, the murder of his wife Sharon Tate at the hands of the Manson Family caused him to pass on the director's chair.
Roman Polanski was present during the entire filming of A Day at the Beach. He was editing the picture and shooting inserts with the director, Simon Hesera, when news came of his wife's murder in California. He left England that night. The film was hastily finished without him, put on the shelf and has only recently been rediscovered.