Revealing mistake: When Goldie Hawn pushes Kurt Russell off the boat you can see he has flippers on in the water.
Overboard (1987)
1 revealing mistake - chronological order
Directed by: Garry Marshall
Starring: Kurt Russell, Goldie Hawn, Edward Herrmann, Katherine Helmond
Continuity mistake: After Dean discovers Joanna on the couch, her face covered in calamine lotion, he picks her up and carries her into the bedroom. As he sets her on the bed the viewer can see her face is free from any "spots" and/or lotion.
Capt. Karl: What're you doing?
Annie: I'm turning the boat around.
Capt. Karl: Why?
Annie: I'm going home.
Capt. Karl: You're turning that wheel around too fast.
More trivia for Overboard
More questions & answers from Overboard
Answer: This is just speculation, but since he knew what hospital she'd been in, he likely went there and asked who'd claimed her and where they lived. It wouldn't be too difficult.