Continuity mistake: When Magnum is holding the negatives tube behind his back while on deck, there are two closeups of the tube in his hand, but in these closeups the watchband on Magnum's wrist is a completely different style. (00:43:40)
Visible crew/equipment: When Danny Frye snatches the negatives tube from Magnum's hand and takes off, in the following shot as Magnum moves Peggy aside, the black tape mark is visible on the deck in front of Mrs. Tate's feet. (00:43:55)
