`Down Periscope” is a submarine comedy in which a maverick commander and a misfit crew on an ancient World War II diesel-powered submarine join forces to outwit a nasty rear admiral during war games.

Perhaps this zany comedy should have been called “David and Goliath at Periscope Depth.” Violence: A few bumps and bruises, a mock plank walking and two exploding torpedoes. Sex: Nothing more risque ...