Voyage to the Bottom of the Sea

Voyage to the Bottom of the Sea is a 1960s American science fiction television series based on the 1961 film of the same name.  Both were created by Irwin Allen.

Voyage to the Bottom of the Sea was the first of Irwin Allen’s four science fiction television series, as well as the longest running.  It was broadcast on ABC from September 14th, 1964 to March 31st, 1968, and was the decade’s longest-running American science fiction television series with continuing characters.  The 110 episodes produced included 32 shot in black and white (1964–65), and 78 filmed in color (1965–68).  The first two seasons took place in the then future of the 1970s.  The final two seasons took place in the 1980s.  The show starred Richard Basehart and David Hedison.
The pilot episode “Eleven Days to Zero” was filmed in color but shown in black and white.  It introduces the audience to the futuristic nuclear submarine S.S.R.N. Seaview and the lead members of her crew, including the designer and builder of the submarine Admiral Harriman Nelson (Richard Basehart), and Commander Lee Crane (David Hedison), who becomes the Seaview’s captain after the murder of her original commanding officer.  The submarine is based at the Nelson Institute of Marine Research (NIMR) in Santa Barbara, California, and is often moored some 500 feet below NIMR in a secret underground submarine pen carved out of solid rock.  The Seaview is officially for undersea marine research and visits many exotic locations in the seven seas, but its secret mission is to defend the planet from all world and extraterrestrial threats in the then-future of the 1970s.