The Sentinel

The Sentinel was a large robotic arm on a 180 degree turret that acted as a house robot in the second series of Robot Wars. It was, in fact, a modified JCB and unique among the house robots in that it was operated inside the arena rather than outside. The arm ended with a large spiked club, designed to push and trap robots passing. Although primarily used in the Gauntlet as an obstacle, The Sentinel was also later used in the Arena stages. Because of its status as an "obstacle" rather than a proper house robot, The Sentinel was not used outside its debut season.