Trivia: The bystanders looking at the camera when Rosemary crosses the street were staring in disbelief as Mia Farrow actually wandered out into oncoming traffic! Polanski did not want to "stage" the scene, so she was literally risking her life.
Trivia: The scene where Barbara crashes the car into the tree wasn't scripted originally; an accident that put a large dent in the car before the scene was shot prompted George Romero to re-write the scene in such a way that the dent is justified.
Trivia: In the restaurant scene near the beginning of the film, the actor playing the waiter accidentally flips the corner of the menu in Steve McQueen's eye, but it was left in the finished film.
Trivia: Patrick McGoohan committed himself to appearing in "Ice Station Zebra" whilst he was filming his famous TV series "The Prisoner". However, as is well known, "The Prisoner" went massively overbudget and seriously behind schedule. As a result, McGoohan had to leave filming of "The Prisoner" in late 1967 for several weeks, in order to appear in "Ice Station Zebra". This is the reason why several episodes of "The Prisoner" have McGoohan either absent or only in previously filmed flashbacks and inserts...McGoohan could not be filming both "The Prisoner" at Elstree, and "Ice Station Zebra" in Hollywood at the same time.