Revealing mistake: When Sassy comes out of the burning house carrying the kitten in her mouth you can tell that the kitten is fake.
Homeward Bound II: Lost in San Francisco (1996)
1 revealing mistake - chronological order
Directed by: David R. Ellis
Starring: Michael J. Fox, Sally Field, Ralph Waite, Al Michaels
Factual error: When the plane is taking off while the animals are on the runway they duck down hoping it will stop and it becomes airborne shortly before hitting them. In actuality they should have been blown backwards from the jets like ragdolls.
Sassy: Does the cat always have to be the brains of the operation? Beauty and brains. I never cease to amaze myself.