Niagara (1953)

Continuity mistake: At the Scenic Tunnel Marilyn's lover writes a message to her on a postcard and places it back into the rack. She walks over and reads it but it isn't in the same place that he put it as the postcard next to it is different. (00:33:55)

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Continuity mistake: When George Loomis comes back to the cabins, after the lover tried to kill him at the falls, he wears the lovers shoes. But after he walks on the grass, just before the end of the shot, the top of the shoes is not white anymore as if he was wearing his own shoes. (00:45:00)

Wargames

Continuity mistake: Inspector Starkey gets into the police car before Ray Cutler, who sits in the rear driver side seat as they pull away. Several shots later we see them again in a close-up chasing George Loomis and their positions in the rear of the police car have reversed. (01:20:50)

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George Loomis: Too bad, they can't play it for you now, Rose.

George Loomis: You smell like a dime store. I know what that means.
Rose Loomis: Sure. I'm meeting somebody, just anybody handy, as long as he's a man! How 'bout the ticket seller himself? I could grab him on the way out, or one of the kids with the phonograph. Anybody suits me. Take your pick.

George Loomis: I loved you, Rose. You know that.