In the scene when Doug is getting cloned the first time, he mentions he doesn't want to turn out like Jeff Goldblum in The Fly (1986). Michael Keaton was offered the lead role of Seth Brundle in the film but turned it down. See more

Goofs

Near the end of the movie after Laura and the kids drive from the house, Doug #2, #3 & #4 drive out of the garage. Doug #4 is at the middle of the rear seat. In the next and in following shots, he is at the left hand side of the car. See more