ep #13, season 1: “Raiders Of The Lost Sub” - Tuesday May 15, 1984 on NBC
Writer: Mark Jones
Director: Dennis Donnelly
Show Stars: Perry King (Cody Allen), Marsha Warfield (Max), Anne Francis (Mama Jo), Joe Penny (Nicholas (Nick) Ryder), Ken Olandt (Kirk “The Dool” Dooley), Thom Bray (Dr. Murray “The Boz” Bozinsky, PhD)
All Guest Stars: Steven Keats (Ted Cardwell), Geena Davis (Melba “Bubba” Bozinsky P.H.D), Stefan Gierasch (Heinrich Von Schlauser), Lance Henriksen (John McMasters)

The detective trio are depressed over a lull in business, when Murray’s attractive, practical joke-loving sister Melba arrives, looking for their help in proving her theory that Hitler had established a port on the U.S. west coast during World War II. She neeeds to prove the theory after her initial report was rejected by a publisher and editor. With the help of a German historian friend of Melba’s, they begin their search for a German U-boat loaded with gold that was rumoured to have sunk somewhere in the area, but their party comes under attack from the publisher and editor who rejected Melba’s report, who want to get their hands on the sunken gold for themselves. But unbeknown to the detectives, the pair aren’t the only ones out to sabotage the quest…

Riptide is a series about three vietnam veterans (Nick Ryder, Cody Allen and Murray Bozinsky), working as private eyes in sunny southern California. Nick and Cody are the muscles and Murray is a computer wizard of the trio, and together they solve even the hardest cases.

Episode notes:
Apparently, the German dubbed version of this episode has many of the references to Nazis altered and removed.
At the time when this episode was made, Geena Davis had yet to make her name “in the big time”, which is reflected by the fact that she only receives a standard Guest Star credit; Special Guest Star credit for this episode goes to Steven Keats.
This is the last episode of the series to feature Marsha Warfield as re-occurring 1st season character Max.

Courtesy of tv.com and IMDb.