Captain Scarlet was the first Gerry Anderson show in which the puppets had human proportions. This was possible because the lip-synching mechanics were now small enough to fit in the puppets chests.
Colonel White, Captain Black and the Mysterons were all voiced by the same artist - Donald Gray. During a career that ran from 1934 to 1972, he also appeared in the Hammer version of the Quatermass Experiment as a TV announcer, and in Emmerdale Farm!
The puppet heads were originally sculpted from Plasticine. Plaster moulds were then taken to make fibreglass heads used on the puppets. You can find out more about a puppet's mechanism at the TV Century 21 site.
The Mysterons are invisible because Gerry Anderson didn't want them to appear 'wrong' if life were ever found on Mars.
A new version of Captain Scarlet is being made by Gerry Anderson and The Moving Picture Company - but this time, it's fully computer generated!
A modern beatgroup combo, The Spectrum, was formed to release the theme song. It didn't do very well in the charts. It might be because they all wore the uniforms.
Captain Scarlet's real name is Paul Metcalfe.
Lieutenant Green trained as a Hydrophone operator in World Aquanaut Security Patrol - that's right, he was nearly in Stingray.
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