Towards the end of his life, Rodney Dangerfield starred in (and sometimes also wrote) several low budget movies that either went straight to video or had a limited release beforehand, this movie being one of them. It was quietly released and hasn't been rediscovered, and I think I know why. While the production values are okay for a made-for-video cheapie (though there are obvious cost-cutting actions like filming on studio backlots and trying to pass the California countryside as Italy), and Dangerfield in his 80s still has energy (though it's obvious when a stunt double is used), there is a problem with the screenplay he co-wrote - it's not very funny. It lacks the zing and outrageousness associated with Dangerfield in the past. In fact, it seems to have been aimed at a family audience. That wouldn't be bad if the movie was funny, but it isn't. It's pretty predictable, both with its story and humor. One surprise about the movie is that it was produced by Joseph Merhi, who earlier had made a name for himself with exciting made-for-video action flicks. Watch one of those instead.
Review of The 4th Tenor
