Monstron

The Monstrons are a blue-skinned spacefaring humanoid race which employs armies of robots known as Engibrains to conquer other worlds and enslave the natives.

History
In the early days of the Dalek Empire, a Monstron ship landed on Skaro and sent the Engibrains to conquer it, but they were defeated by the Daleks.

Appearances

 * The Dalek Chronicles, "The Menace of the Monstrons" (1965)