Hardie suspects that a paroled man--who is working as an eccentric frontier dentist--may have something to do with a murdered stage driver. Guest starring Edgar Buchanan ('Petticoat Junction').
After coming upon a Japanese submarine sunk during World War II, amateur skin-diver Gerald Wiley goes suddenly berserk and tries to strangle his wife. Called to the pair's assistance, Mike also goes strangely berserk.
