Plot hole: Stuart establishes that there is only one of you and that when you travel through time you can repeat things, but it will be you and not your double that does it. But, at the end, when the Duke is going up the stairs and the uncle says "Where have you been...", the Duke is wearing the same clothes as the first time. Yet we see that he goes directly from the time portal to his house in the ballroom raiment of the later scene. Where did the old clothes come from?
Kate & Leopold (2001)
2 plot holes - chronological order
Directed by: James Mangold
Starring: Hugh Jackman, Liev Schreiber, Meg Ryan, Breckin Meyer, Natasha Lyonne
Factual error: The morning after Leopold and Stuart travel to the present, the two of them are talking about why Leopold followed Stuart to the bridge. Leopold mentions that he was afraid Stuart might be Jack the Ripper, whose first murder was in 1888, twelve years after Leopold's time. (00:17:55)
More quotes from Kate & Leopold
Trivia: The movie was re-edited days before its release because critics at one of the press screenings noticed a glaring problem. Originally, Leopold was Stuart's great, great grandfather. Since Kate eventually went back in time to be with Leopold, she would be Stuart's great, great grandma as well. Talked about whacked out incest. Most instances of that relationship were removed (it is alleged that Leopold's line "I felt that we met before on a previous occasion" early on was left in by mistake,) though it is explained on the director's cut version on the DVD.