S2E1 - Jonah and the Whale
The Seaview is on a joint mission with Russian scientists to salvage the remains of a Soviet undersea lab. While a scientist is being lowered in the diving bell, a giant whale arrives and rams the bell. The glass is shattered, killing him.
Nelson and the remaining Russian scientist, Katya Markova, go on a second dive. The whale reappears, this time swallowing the diving bell whole! Now it's a race against thime as Captain Crane and the crew of the Seaview find the diving bell and get it out before Nelson and Markova run out of oxygen!
Sept. 19, 1965, midnight
S2E2 - Time Bomb
Nelson is injected with a radioactive material that makes him a walking time bomb.
This episode marks the first appearance of the FS-1!
Sept. 26, 1965, midnight
S2E3 - ...And Five of Us Are Left
Seaview comes to the rescue of newly discovered WWII survivors living in an underwater cave beneath a rumbling volcano.
Oct. 3, 1965, midnight
S2E4 - The Cyborg
Cybernetic genius Tabor Ulrich creates a perfect mechanical duplicte of Admiral Nelson. His plot: to make the crew of the Seaview they are fighting World War Three. In doing so, the sub will launch nuclear missles at the China, Russia and the USA. After the holocaust, Ulrich plans to take over and usher in "the age of the cyborg".
Oct. 17, 1965, midnight
S2E5 - Escape from Venice
Crane is caught up with a circle of spies as he tries to make his way back to Seaview with important missile defense data.
Oct. 24, 1965, midnight
S2E6 - The Left-Handed Man
Nelson works on finding an assassin before he can kill the new Secretary of State.
Oct. 31, 1965, midnight
S2E7 - The Deadliest Game
While inspecting undersea bomb shelters with the President, aides attempt a power grab.
Nov. 7, 1965, midnight
S2E8 - Leviathan
Nelson and crew are invited to a marine scientist's undersea lab for a visit but there is giant sea life in the way.
Nov. 14, 1965, midnight
S2E9 - The Peacemaker
Defecting scientists create a proton bomb, but are killed by a foriegn power and the bomb is captured. A surviving scientist works at disarming the bomb...with other plans in mind.
Nov. 21, 1965, midnight
S2E10 - The Silent Saboteurs
Asian powers attempt to interfere with the American Space Program.
Nov. 28, 1965, midnight
S2E11 - The X Factor
A toy manufacturer is involved with kidnapping and shipping politicians and scientists to foreign powers.
Dec. 5, 1965, midnight
S2E12 - The Machines Strike Back
A missile defense platform-drone malfunctions and threatens to destroy the East Coast of the US.
Dec. 12, 1965, midnight
S2E13 - The Monster from Outer Space
A space probe returns to earth and is recovered by Seaview...only to unleash an alien organism aboard.
Dec. 19, 1965, midnight
S2E14 - Terror on Dinosaur Island
A submerged domed island is forced to the surface by its volcano and exposes a Jurassic-style world.
Dec. 26, 1965, midnight
S2E15 - Killers of the Deep
A foreign power is salvaging sunken nuke missiles from the ocean floor to make themselves a superpower.
Jan. 2, 1966, midnight
S2E16 - Deadly Creature Below!
Seaview rescues two men adrift at sea, only to discover they are escaped prisoners intent on not returning to prison. While they attempt to hijack the sub, an undersea creature surfaces to menace the Seaview.
Jan. 9, 1966, midnight
S2E17 - The Phantom Strikes
Seaview encounters a sunken WWI sub...with someone still left aboard.
Jan. 16, 1966, midnight
6.0
S2E18 - The Sky's On Fire
Cruising for days under the ice, Seaview surfaces to find the sky is ablaze thanks to the Van Allen belt catching fire. Nelson races to Washington to confer with fellow scientists and hatches a plan to detonate a nuclear device into the atmosphere and extinguish the fire. Weber, a Fellow scientist, feels they should do nothing and allow the fire to burn out. Nelson disagrees and takes Weber and two others aboard Seaview to decide the course of action as the sub races to the firing point. However, Weber is determined to stop Nelson and is willing to kill to do it!
Jan. 23, 1966, midnight
S2E19 - Graveyard of Fear
A scientist and his secretary come aboard Seaview when their research vessel is sunk by a giant Portugese Man-Of-War. They want Admiral Nelson to return to the scene, but won't tell him the real reason.
Jan. 30, 1966, midnight
S2E20 - The Shape of Doom
Dr. Alex Holden is hunting a gigantic whale in which he has injected an experimental growth serum. It turns and destroys his boat, killing his crew. He is rescued by Seaview, which was on en route to plant a nuclear device to blast an undersea channel Holden obsesses over getting his swallowed equipment from the whale when it turns and comes at the sub, swallowing the bomb as it is being lowered! Nelson cannot detonate the bomb, as the president's carrier is in the area. The nearly insane Holden steals Nelson's remote detonating device and threatens to blow up the whale if he's not permitted to get samples of the whale.
Feb. 6, 1966, midnight
S2E21 - Dead Men's Doubloons
A 16th century pirate seemingly comes back from the grave to threaten Seaview.
Feb. 13, 1966, midnight
S2E22 - The Death Ship
Things go wrong when Nelson and Crane test out a new automated system for Seaview.
Feb. 20, 1966, midnight
S2E23 - The Monster's Web
Captain Gantt, an ego-maniacal scientist, is in a nuclear sub testing a powerful new fuel. Due to his bungling, the sub crashes into a giant web and is attacked by a monsterous sea spider. The Seaview investigates and rushes to retrieve the remaining fuel canisters before the enormous underwater pressure collapses the test sub abd detonates the fuel - an explosion which would kill millions!
Feb. 27, 1966, midnight
S2E24 - The Menfish
With Admiral Nelson away, his old friend Admiral Park takes over Seaview's current mission. Dr. Borgman is conducting experiments, and Park suspects he is up to no good.
March 6, 1966, midnight
S2E25 - The Mechanical Man
Drs. Paul Ward and Peter Omir have discovered a powerful new element -- Subterranium 116. This element can produce limitless pure energy, but Omir may have another agenda.
March 13, 1966, midnight
S2E26 - The Return of the Phantom
Captain Krueger returns to compel Nelson to shoot Crane. Once that is done, Krueger takes over Crane's body and searches out a host for Lani, Krueger's dead lover, so the two can be reunited. Can Admiral Nelson save his friend and end the plans of the evil Captain forever?
March 20, 1966, midnight