1x1 - Wakaki Shishi-tachi no Tanjo

October 13, 1979

1x2 - Episode 2

October 13, 1979

1x3 - Episode 3

October 13, 1979

1x4 - Episode 4

October 13, 1979

1x5 - Buru Noa Minami Kudasu!

October 20, 1979

Colin and his surviving classmates make it to the N-1 island where they find the mysterious Thundersub.

1x6 - Sangosho Kyushutsu Sakusen

November 3, 1979

After launching the Thundersub, the thunder-team find a downed Cuban fighter pilot then launch their first attack on the Gotham.

1x7 - The Secret of Gotham Base

November 10, 1979

1x8 - Gotham's Terraforming Plan

November 17, 1979

While heading for Bermuda, Captain Noah and the thunder team discover the death force have enslaved the remaining human survivors of the Gotham invasion and they plan a rescue mission.

1x9 - Adam and Eve of the South Seas

November 24, 1979

Colin and Domingo break into the death force base to rescue the enslaved human survivors.

1x10 - Burning Southern Cross

December 1, 1979

1x11 - Attack That Tower!

December 8, 1979

Colin and Capilla escape from the island with their lives before being rescued by the Tempest Junior.

1x12 - Hurricane of Love and Anger

December 15, 1979

Kapilla and Tara try to appeal to Captain Noah to return them to Gypsy Atol.

1x13 - Detour of Decision

December 22, 1979

While on their way to the Gilbert islands, the Thunder team discover the death force has constructed an elevator that can reach as high as the terror star.

1x14 - Vow to Tomorrow

December 29, 1979

Captain Noah and the Thundersub team devise a plan to attack the Deathforces orbital elevator.

1x15 - Tara, Her Love

January 5, 1980

The Thundersub returns to the gypsy atoll island to aid Kapila and Tara after receiving an S.O.S from them.

1x17 - Thrilling! The Dummy Strategy

January 19, 1980

After arriving at Antarctica, the Thunder team take refuge inside an iceberg for much needed recovery.

1x18 - First Report from Bermuda

January 26, 1980

1x19 - First Report from Bermuda

February 2, 1980

The Thundersub crew becomes stricken with food poisoning caused by a red tide. deployed by the death force and Anna and Sarah both try to find the antidote.

1x20 - Showdown in the Abyss

February 9, 1980

The Thundersub gets entangled in an anti submarine Net set up by the death force but Anna comes up with an escape plan to get the Thundersub out.

1x21 - The American Channel Breakthrough Strategy

February 16, 1980

1x22 - Amazon Surprise Strategy

February 23, 1980

1x23 - 48 Hours in Bermuda

March 1, 1980

Colin assumes command of the Tempest Jr after Skipper Grogen sacrifices himself to save tempest team from incoming Danger.

1x24 - Now, to Space

March 8, 1980

1x25 - Gotham's True Colors

March 15, 1980

1x26 - Gotham, Where To Go

March 22, 1980

1x27 - Earth, Forever!

March 29, 1980

After its completion for space travel, the Thundersub team begin their mission to combat the death force from outer space.