 During filming, McGoohan had to be rescued from a flooded chamber by a diver who freed his trapped foot, saving his life.Because his television series "The Prisoner" was in production during principal photography in "Ice Station Zebra", Patrick McGoohan had the episode "Do Not Forsake Me Oh My Darling" re-written to have the mind of his character transferred into the body of another character.Filming finished in October 1967.