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Watch Fireball XL5 - Season 1 Episode 21 Online!:

While stargazing, Prof. Matic discovers a new planet, but it doesn't read on any electronic instruments. Curious, Steve and the others set out in the XL5 to investigate, and find that the planet is more sinister than first thought...

Writing:
  • Sylvia Anderson
  • Gerry Anderson

Stars:
Release Date: 1962-10-28
Seasons: 1
TMDb: 6.1/10
  • Country: GB
  • Language: English
  • Runtime: 25

Other episodes for this season

Planet 46
Episode 1 - Planet 46
The Doomed Planet
Episode 2 - The Doomed Planet
Space Immigrants
Episode 3 - Space Immigrants
Plant Man From Space
Episode 4 - Plant Man From Space
Spy in Space
Episode 5 - Spy in Space
The Sun Temple
Episode 6 - The Sun Temple
XL5 to H2O
Episode 7 - XL5 to H2O
Space Pirates
Episode 8 - Space Pirates
Flying Zodiac
Episode 9 - Flying Zodiac
Space Pen
Episode 10 - Space Pen
Space Monster
Episode 11 - Space Monster
The Last of the Zanadus
Episode 12 - The Last of the Zanadus
Planet of Platonia
Episode 13 - Planet of Platonia
The Triads
Episode 14 - The Triads
Wings of Danger
Episode 15 - Wings of Danger
Convict in Space
Episode 16 - Convict in Space
Space Vacation
Episode 17 - Space Vacation
Flight to Danger
Episode 18 - Flight to Danger
Prisoner on The Lost Planet
Episode 19 - Prisoner on The Lost Plan...
The Forbidden Planet
Episode 20 - The Forbidden Planet
Robert to the Rescue
Episode 21 - Robert to the Rescue
Dangerous Cargo
Episode 22 - Dangerous Cargo
Mystery Of The TA2
Episode 23 - Mystery Of The TA2
Drama At Space City
Episode 24 - Drama At Space City
1875
Episode 25 - 1875
The Granatoid Tanks
Episode 26 - The Granatoid Tanks
The Robot Freighter Mystery
Episode 27 - The Robot Freighter Myste...
Whistle for Danger
Episode 28 - Whistle for Danger
Trial by Robot
Episode 29 - Trial by Robot
A Day in the Life of a Space General
Episode 30 - A Day in the Life of a Sp...
Invasion Earth
Episode 31 - Invasion Earth
Faster Than Light
Episode 32 - Faster Than Light
The Day the Earth Froze
Episode 33 - The Day the Earth Froze
The Fire Fighters
Episode 34 - The Fire Fighters
Space City Special
Episode 35 - Space City Special
Ghosts Of Space
Episode 36 - Ghosts Of Space
Hypnotic Sphere
Episode 37 - Hypnotic Sphere
Sabotage
Episode 38 - Sabotage
Space Magnet
Episode 39 - Space Magnet