Raston Warrior Robot

Raston Warrior Robots were the most perfect killing machines ever devised. They were silver androids and among the deadliest players of the Game of Rassilon in the Death Zone.

Abilities
The robots hunted by detecting movement and could move at fast speeds. They would move by jumping in the air and disappearing, then reappearing at their destination - the Third Doctor remarked they "moved like lightning", which might mean the robots did not actually teleport, but rather moved too fast to be seen. They had built-in weapons and could fire disks and arrows from their hands. They enjoyed toying with their prey. The robots were incredibly powerful and could kill a squad of Cybermen in less than a minute. (DW: The Five Doctors)

They were capable of feeding on atomic radiation in the atmosphere. This meant they never ran down. The loss of their heads did not diminish their efficiency, as they could just simply reattach them. They were also programmed to consider anyone except their makers as their enemy. If blown up, they could simply reform. (PDA: World Game)

They attacked by locking onto the electrical activity of the target's brain (with two people possessing the same pattern causing the robot to jam). The javelins they extruded were generated by the Raston warrior robot, whose entire weapon system was inbuilt. They could repair themselves from severe damage such as decapitation. (EDA: The Eight Doctors)

History
A legend stated that the Raston Warrior Robots were the product of a race who were old when the Time Lords were young. This race was devoted to the creation of super weapons. It vanished without a trace. (EDA: The Eight Doctors) It was possible that this was a marketing ploy on the part of the Raston Hardware Company, who may have produced the warrior robots (along with cybernetic lap-dancers) in a warehouse on Tersurus Luna. The dancers were considerably less indestructible, particularly by the Krotons. (EDA: Alien Bodies)

When the Death Zone was reactivated and four of the Doctor's incarnations were trapped there, the Third Doctor and Sarah Jane Smith encountered a Warrior Robot by a cave entrance and had to remain still to avoid detection. A patrol of Cybermen appeared and the robot attacked them instead, firing a barrage of arrows into their chest plates and killing them all. (DW: The Five Doctors)

Ryoth used the Time Scoop to send this robot to the Eye of Orion. There it attacked the Fifth Doctor, Tegan Jovanka and Vislor Turlough. The Eighth Doctor joined them. By using the paradox known as Buridan's ass, they approached it at the same pace so that both were equidistant from it. Unable to decide upon a target, the Raston Warrior Robot deactivated. It was reactivated when a Sontaran trooper kicked it. It killed the entire regiment but was itself killed by Commander Vrag who, in his death throes, ripped its head off. It repaired itself and resumed guarding the area. (EDA: The Eight Doctors) The Master once used a Raston Warrior Robot to attack the Graak inside the Fourth Doctor's mind. (VG: Destiny of the Doctors)

Sebastiene once killed a Raston Warrior Robot and added it to his collection of trophies. (NSA: The Doctor Trap)

Behind the scenes

 * Autons were originally planned to appear in The Five Doctors instead of the Raston Warrior Robot but, for unknown reasons, did not. (possibly budget reasons)
 * Russell T Davies in the DWM 393 expressed some interest in bringing back the Raston Warrior Robot in the new series of Doctor Who, citing DW: The Five Doctors as the finest episode in the series. This did not occur during his tenure.
 * The Raston Warrior Robot was played by Keith Hodiak, who was an actor, but is more famous as a professional ballet dancer and instructor.
 * A Raston Warrior Robot had a cameo in Robert Webb's Great Movie Mistakes III: Not in 3D. It appears in the background in one of the "mistakes" when the show makes up something that happened in the show itself. Here, it is referred to as a "Silver Warrior Robot".