C is for... Chameleons

An alien race who lost their physical identities in some unspecified disaster - some sort of explosion. They came to Earth, establishing a base at Gatwick Airport, south of London, in 1966. They set up a budget airline - Chameleon Tours - which was aimed at young people. They flew to destinations all over Europe. Their aircraft were really disguised spaceships. Once in flight, the passengers were drugged and miniaturised, and then carried up to a space station in hidden orbit above the Earth. The Chameleons would then assume the identity of the passengers. All of the Chameleon Tours crew, as well as key airport officials, had been substituted in order to conceal their activities. The passengers would be encouraged to write postcards home to family and friends before take-off to further the deception. An arrogant species, the Chameleons believed human beings were little more than animals.
When the Doctor and his companions arrived at the airport, they hid from police and Polly witnessed a Chameleon posing as a crewman named Spencer shooting another man. This turned out to be a police detective, investigating missing persons reports. Polly was then kidnapped and substituted herself. The Doctor investigated and discovered the Chameleon plan. Pretending to be a Chameleon he travelled up to the space station, only to be captured. The real airport personnel were found unconscious in one of the car parks, and one of them had its control bracelet removed - killing the Chameleon duplicate on the station. This led to dissent amongst the aliens. Those whose human bodies were still on Earth rebelled against the Director and those whose human bodies were safely stored in the station. The Director, and a copy of Jamie, were killed, whilst the rest of the Chameleons agreed to return all the abducted humans. The Doctor offered them some new ideas about overcoming their problems.

Played by: Donald Pickering (Captain Blade), Victor Winding (Spencer), Bernard Kay (Director). Appearances: The Faceless Ones (1966).

• One of those races who never name themselves on screen. It would be a massive coincidence if this was their true name. 
• It is not specified if they have taken over an existing airline, or set it up themselves.
• Bizarrely, no-one has ever noticed that not one of their flights has ever landed at its destination.