Richard Fleischer's "Million Dollar Mystery" has essentially the same plot as Stanley Kramer's "It's a Mad, Mad, Mad, Mad World". Here a strange man (Tom Bosley of "Happy Days") dies in a diner and tells everyone in the vicinity that there's $4 million buried, and so they spend the rest of the movie experiencing a series of mishaps trying to find it. Obviously it's not even in the same league as "IaMMMMW" - and the product tie-in certainly weakens the movie - but it's good for a few silly laughs. As can be expected, Eddie Deezen is a riot. Equally funny is Kevin Pollak as a cop who's more into impersonations than crime-fighting. The movie's probably OK seeing once. I recommend the original version more.
Review of Million Dollar Mystery
