Mute (species)

The Mutes were a race who did not speak.

They lived inside the hollow planet called the third planet. There they did the bidding of the Shadow, helping him in his quest for the Key to Time. After the destruction of the Planet of Evil, the Mutes on it were killed alongside their leader. (TV: The Armageddon Factor)

Behind the scenes

 * The Mutes were played by Stephen Calcutt, who was uncredited on-screen for parts five and six but credited in Radio Times; and Ridgewell Hawkes, Derek Suthern, James Haswell and Danny Rae, who remained uncredited both on-screen and in Radio Times.
 * Stephen Calcutt was also referred to as Super Mute in BBC paperwork.