13 Black

13 Black was a rectangular shaped robot with two spinning discs. One of the discs was black with the number 13 on it, the other was painted to look like a roulette wheel. Although it did not appear to be so, 13 Black was capable of running inverted, using its flywheels to "crab-walk" around the arena. 13 Black's best performance was in Series 6, where it reached the semi-final. Although it competed in Series 5-7, the team also entered Series 2 with a tracked robot called Limpet.