'U-509' (Story Code '45109') by Michael Wagner

Henry Bulman, a retired submariner from England’s Royal Navy, locates the U-509 - an abandoned Nazi U-boat containing a horde of deadly nerve gas. He reactivates the vessel and then gives the United States Government an ultimatum: unless he receives the sum of $20 million he will use the submarine’s deadly cargo to kill 30,000 American citizens. The O.S.I sends in Steve Austin to stop Bulman; resisting the intense water pressure, Steve dives into the depths and manages to board the sub. But then Bulman takes him prisoner, and prepares to carry out his terrible threat of mass murder…

Lee Majors (Colonel Steve Austin), Richard Anderson (Oscar Goldman), Martin B. Brooks (Doctor Rudy Wells), Guy Doleman (Bulman), Ian Abercrombie (Shoemacher), Ted Hamilton (Jaffe), William Sylvester (Prescott), Steve Sandor (Covell), Peter Canon (Lewis), Morgan Jones (Captain), Len Wayland (Dorn), Josh Taylor (O.D.), Tom Dever (Talker)

Directed by Phil Bondelli
Produced by Allan Balter
Executive Producer Harve Bennett
Based on the novel by Martin Caldin

TX (US): 20th February 1977

Notes:
*Featuring Colonel Steve Austin, Oscar Goldman and Doctor Rudy Wells