The 39 Steps

Revealing mistake: The serial number of the autogyro has been reversed, showing that the stock shot has been reversed for effect.

Revealing mistake: When the compere introduces Mr. Memory in the Music Hall at the start of the film, Robert Donat's stand-in is sitting in his place in the audience on at least two occasions.

Revealing mistake: During Mr Memory's act at the beginning of the film, a woman asks, "Who was the last British heavyweight champion of the world?". As she is saying this, you can see the man sitting next to her mouthing her exact words.

Revealing mistake: During Mr Memory's performance at the end of the film, he stops speaking and flinches before the shot is fired.

Revealing mistake: During Mr Memory's performance at the end of the film, he stops speaking and flinches before the shot is fired.

More mistakes in The 39 Steps

Richard Hannay: There are 20 million women in this island and I've got to be chained to you.

More quotes from The 39 Steps

Trivia: Director Alfred Hitchcock has a cameo role in this film - he is seen tossing some litter as Richard and Annabella run from the music hall.

More trivia for The 39 Steps

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