an Entity references as follows:
Morning Departure (released as Operation Disaster in the United States) is a 1950 British naval drama film about life aboard a sunken submarine, directed by Roy Ward Baker, and starring John Mills and Richard Attenborough. It is based on a stage play of the same name by Kenneth Woollard, which had also been shown as a live TV play by the BBC both in 1946 and 1948. It was the feature film debut of Michael Caine.