A Deadly Deadly Robot is a model of robot characterized by a large, spherical torso, three pincer-like legs and a small round head. Deadly Deadly Robots have a large claw as their right hand, and a large laser- or plasma-based weapon as their left.

A rampaging army of DDRs are responsible for the death of Captain Lucas, leaving him as a vaporized pile of ash (although surprisingly, Lucas' moustache survived the blast). While this largely appeared to be incidental, a conversation between Llewellyn and Hayter in Rogues and Scallywags suggests that there may be more to their presence.