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All Seasons

Season 1

  • S01E01 Deepest of the Deep

    • September 22, 1971
    • NBC

    Debut: In the premiere episode a man (Chris Robinson) seeking to steal a new invention by Primus' sidekick is thwarted when his two man sub gets trapped when a mining explosion causes an underwater rock fall. The new invention is a robot that allows mining at up to 350 feet below sea level depth. With the aid of the new robot, Primus rescues the would be thief.

  • S01E02 Trial and Terror

    • September 29, 1971
    • NBC

  • S01E03 Kiss of Life

    • October 6, 1971
    • NBC

    A deep sea scientist is stung by a scorpion fish to which he is highly allergic and becomes incapacitated in the depths of the ocean floor.

  • S01E04 Underwater Getaway

    • October 20, 1971
    • NBC

  • S01E05 The Phantom Horse

    • October 27, 1971
    • NBC

  • S01E06 Bearer of Light

    • November 3, 1971
    • NBC

  • S01E07 Oil Rig

    • November 10, 1971
    • NBC

  • S01E08 Pipeline to Danger

    • November 17, 1971
    • NBC

  • S01E09 Breaking Point

    • November 24, 1974
    • NBC

    Primus and Charlie Kingman arc spending 60 days in the undersea habitat Tektite II with three astronauts while they prepare themselves for a life on a manned space laboratory. However, as time elapses, Marshall Grant, one of the astronauts, begins to crack under the stress and strain of the mission and barricades himself in the wet room. Before Primus and Kingman can reach him, he switches off the life-giving supply of oxygen being fed to the habitat, endangering all.

  • S01E10 The 65th Minute

    • December 1, 1971
    • NBC

  • S01E11 Blade of Fire

    • December 8, 1971
    • NBC

    While training dry land minors to dig on the ocean floor, Primus is warned of a hurricane expected to hit the area of the dive.

  • S01E12 Tektite #1

    • December 15, 1971
    • NBC

  • S01E13 49 Sharks

    • December 22, 1971
    • NBC

  • S01E14 The Sea is Boiling Hot

    • December 29, 1971
    • NBC

  • S01E15 Death Tide

    • January 5, 1972
    • NBC

  • S01E16 Sea Serpent

    • January 12, 1972
    • NBC

  • S01E17 The Sniper

    • January 19, 1972
    • NBC

  • S01E18 The Steel Fish

    • April 21, 1972
    • NBC

  • S01E19 Black Diamonds

    • April 28, 1972
    • NBC

  • S01E20 Infrared

    • May 5, 1972
    • NBC

  • S01E21 Nuclear Black Market

    • May 12, 1972
    • NBC

    The police chase a gang involved in the plutonium black market. Primus replaces one of the gang members, a Navy diver, after the guy is washed away dead on the beach.

  • S01E22 The Black Hole

    • May 19, 1972
    • NBC

  • S01E23 Trapped, Part One

    • May 26, 1972
    • NBC

  • S01E24 Trapped, Part Two

    • June 2, 1972
    • NBC

  • S01E25 The Net

    • June 9, 1972
    • NBC

  • S01E26 Ten Minutes of Eternity

    • June 16, 1972
    • NBC

    Jorge Alquiero hires Primus for a dangerous underwater job. Primus dives after an oceanographer stranded on the ocean floor. But the assignment is hindered by a Benton's plan to steal his sophisticated equipment to look for a treasure.