Greld

The Greld were a insectoid race of arms dealers. They had six legs and two pairs of crab-like claws, mottled dark red shells, four stalked eyes, and leathery wings. When speaking to humans, their speech was noted by words in the incorrect order.

Millions of years ago, the Greld participated in the Millennium War. (PDA: The Quantum Archangel)

In 1587, the Greld attacked the Roanoke colony in Virginia and implanted mind-control devices and components of a meta-cobalt bomb in the colonists who lived in the settlement. In 1609, the Greld used their mind-controlled humans in an attempt to destroy the Armageddon Convention, but were defeated by the First Doctor. (MA: The Empire of Glass)

Some time previous to 2975, the Earth Empire destroyed the Greld homeworld, which then became the prison planet Dis. (NA: Original Sin)