After the Mysterons threaten Spectrum's Cloudbase headquarters, a large fast-moving trace appears on the radar.



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Episode credited cast:
Captain Scarlet (voice)
Captain Blue (voice) (as Edward Bishop)
Donald Gray ...
Cy Grant ...
Elizabeth Morgan ...
Destiny Angel / Rhapsody Angel (voice) (as Liz Morgan)
Gary Files ...
Captain Magenta (voice)
Janna Hill ...
Symphony Angel (voice)
Rest of cast listed alphabetically:
Sylvia Anderson
David Healy
Martin King ...
(voice) (credit only)
Jeremy Wilkin ...
(voice) (credit only)
Lian-Shin Yang


After the Mysterons threaten Spectrum's Cloudbase headquarters, a large fast-moving trace appears on the radar.

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Release Date:

7 May 1968 (UK)  »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


The Mysterons: This is the voice of the Mysterons. We know that you can hear us Earthmen. Spectrum's headquarters Cloudbase is our next objective. We will spare no effort to ensure that Cloudbase is totally destroyed.
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Edited into Captain Scarlet vs. the Mysterons (1980) See more »

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User Reviews

Not the average episode (in a good way)
27 July 2011 | by (United States) – See all my reviews

STORY: 7.6/10 VISUALS: 8.1/10 PACE: 8/10 ENTERTAINMENT: 8.9/10

Look, it's Captain Scarlet, not 'Inception', or 'The Godfather', or anything else like that. So a 7 is the highest that I can really give it. But truly, for a fan of Captain Scarlet, this episode is going to be nearly as good as 'Independence Day'. For someone else... no.

But anyway...

Tony Barwick wrote this one (he writes most Captain Scarlet Episodes), and I must say, it is not your average Captain Scarlet! in ever episode, nearly the same thing happens: Mysterons kill someone and make a double of them, and Captain Scarlet heroically stops them.

Well, in this one, Symphony Angel is shot down and crashes in the desert. Meanwhile, the mysterons come down to earth in flying saucers and begin to attack cloudbase. One by one, members of Spectrum are killed (should have been the last episode) as they attempt to take down the mysterons. And let me tell you, it doesn't end the way you think it does.

Derek Meddings did an amazing job with this one. The beginning crash of Symphony's angle is superb. And then, later when the Mysterons are destroying Cloudbase, there are constant explosions throughout.

A must see episode of Captain Scarlet.


In case you wanted to just skip to the good episodes of Captain Scarlet, I've made a list of the best ones, (The best first):

1. "The Mysterons"

2. "Attack on Cloudbase"

3. "Flight to Atlantica"

4."Lunarville 7"

5. "White as Snow"

6. "Spectrum Strikes Back"

7. "Big Ben Strikes Again"

8. "Crater 101"

9. "Dangerous Rendezvous"

10. "Manhunt"

Bottom five episodes (from best to worst):

1. "Flight 104"

2. "Inferno"

3. "Avalanche"

4. "The Inquisition"

5. "Noose of Ice"

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