This movie has humor, but not gross-out humor. The tongue-in-cheek, James Bond/Lethal Weapon kind of humor. Like Miss Bransford looking in both of their tubs to "compare" the two, without ever saying anything. It has decent action and suspense, and the last 15 minutes has more plot turns that most mysteries.
This is one of my personal favorites, one I can watch over and over again. I believe this gets none of the credit it deserves. It seems to have a stigma because most movies based on TV shows (i.e. Beverly Hillbillies) well, suck.