Revealing mistake: When Philip is in the bathroom at the new house Mike puts toothpaste on his toothbrush and then Philip smiles to reveal missing teeth. Look closely at Philip's teeth and you will see that they are not missing at all - there is black paint on his teeth to make it look like they are missing. (01:14:40)
Yours, Mine and Ours (1968)
1 revealing mistake - chronological order
Directed by: Melville Shavelson
Starring: Henry Fonda, Tim Matheson, Lucille Ball, Van Johnson, Tom Bosley, Louise Troy
Factual error: When Mike is leaving to join the Marines he is in full uniform. Uniforms are not issued to new recruits until after they are processed in. They arrive at Camp Pendleton in civvies.
Frank Beardsley: Is that all? Why didn't she tell me?
Helen North: Because you would have said, "Is that all?"
Trivia: Tim Matheson (Mike) and Jennifer Leak (Colleen) later married after meeting on the set of the movie.