Destroy the Prison Planet
Directed by

Kiyotaka Matsumoto

Produced by

Kimio Ikeda

Written by

Go Nagai

Air Date (JP)

February 14, 1981

Air Date (UK)

March 5, 1983

Previous episode

Bloody Mary's
Asleep in the Ice

Next episode

F-01 Assassination

Destroy the Prison Planet (牢獄惑星を爆破せよ! rōgoku wakusei o bakuha seyo!) is the nineteenth (eighteenth in English) episode of Star Fleet. It aired on February 14, 1981 on Fuji TV in Japan and March 5, 1983 on ITV in the UK.

Plot SummaryEdit

XBomberCrewpatch Spoiler warning: Plot and/or ending details follow.

Unable to sleep and with tensions high, Shiro, Hercules and Lee argue with Dr. Benn over the best course of action, wishing to search for her planet by planet. Dr. Benn supersedes them, arguing this would only take them farther away from their goal, and they can only wait for news from Captain Halley. As Dr. Benn goes to rest, X-Bomber veers hard to the side; someone is tampering with the controls, Dr. Benn deducing it must be Kirara. As they go to the bridge, they find Kirara having another fit and P.P.A. begging for help. Hercules once again has to tranquilize Kirara.

Back on the Imperial Planet, the Imperial Master dispatches Commander Makara and Captain Orion to the Callusian Star Cluster to decimate the Planet Callinean. Lamia, trapped in the Ice Prison, struggles to contact Captain Halley telepathically. Meanwhile, still wishing to do something, the pilots suggest searching for Lamia in the Dai-X fighters to cover a wider area.

Lamia is finally able to tell Halley that she is imprisoned in Glacial Planet in the Allurian star cluster. Halley contacts X-Bomber, reporting that he has heard from Lamia and has traced her to the glacial planet, the rest is now up to X-Bomber. However, Makara's ship has spotted X-Bomber moving on the prison planet and has changed course to intercept.

As X-Bomber nears the Allurian Star Cluster, Kirara awakens, calmed knowing that Lamia is near. X-Bomber remains in orbit around the Glacial Planet while the pilots fly the Dai-X fighters to the surface to rescue Lamia.

All seems peaceful as they overfly the surface, but the Dai-X fighters are soon under fire from ground-to-air missile batteries. X-Bomber detects Makara's Battlecruiser approaching and warns the fighters, so they unite the Dai-X Junction and destroy the Missile base ground defenses. They locate the entrance to the underground prison and enter in spacesuits, finding Lamia and shooting her restraints off. As they leave, Earth tremors start to rock the planet, a nuclear reaction caused by their attack on the missiles; a nuclear explosion is imminent.

Meanwhile, Makara's ship has entered the Allurian star cluster in pursuit of X-Bomber, confused by her stillness. X-Bomber moves to a wider orbit to avoid damage as the pilots struggle to escape with Lamia. Makara's ship detects Dai-X launch, but are caught in the nuclear explosion, limping clear of the planet before the full explosion. Lamia is taken to X-Bomber's sickbay to begin her recovery, as Shiro and Hercules tease Lee's cowardly reaction to the Earthquake.


  • John Lee - "I can't. I can't find the right switch."

Voice CastEdit

Main CastEdit

Character Japanese Voice English Voice French Voice
Dr. Benn Mikio Terashima Peter Marinker Robert Bazil
Shiro Hagen Toshio Furukawa Jay Benedict Éric Legrand
Barry Hercules Shigeru Chiba Constantine Gregory Marc François
John Lee Naoki Tatsuta Mark Rolston Frédéric Pieretti
Lamia Mami Koyama Liza Ross Aurélia Bruno
PPA Yūji Mitsuya John Baddeley Marc François
Captain Halley Katsuji Mori Garrick Hagon
Commander Makara Rihoko Yoshida Denise Bryer Annie Balestra
Captain Orion Reizō Nomoto Sean Barrett Christian Alers
The Imperial Master Banjō Ginga Jacob Witkin Henry Djanik
Narrator Yuzuru Fujimoto Peter Marinker Marc François

Secondary CastEdit

Character Japanese Voice English Voice French Voice
Termoids Masaharu Satō Jacob Witkin Marc François

Equipment UsedEdit

Earth Defence ForcesEdit

Imperial AllianceEdit

  • Imperial Fortress Planet
  • Imperial Battlecruiser



  • Stock footage from Wipe Out the Transport Fleet is used
  • Many sound effects during the Dai-X's attack on the missile base seem to be taken straight off the sound effects track from Episode 4 due to the placement of certain sounds.


  • As Hercules says "could be dangerous, but it's the only way", Shiro's mouth moves but he doesn't say anything.
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