Anecdotes

Film debut of Klaus Maria Brandauer.

Final film score by Bronislau Kaper. NOTE: Most of his music was rejected and replaced by stock cues.

Fourth screen adaptation of a novel by Helen MacInnes. The others were Minuit sur le grand canal (1966), Un espion a disparu (1943) and Un commando en Bretagne (1943).

Second and final film as a producer of Ingo Preminger, brother of Otto Preminger.

Final film of Karen Jensen, though she continued to work in television for the rest of the decade.