At the time of the Series 2 rehearsals, Hairy was black skeletal robot, with largely exposed wires. Its internals contained six McKibben muscles which would make the legs of the robot rather flexible. Each leg was decorated with grey "knee joints" seemingly being based on a spider's legs. It is unknown if the robot was complete at the time.
Although not much is known about its Series 2 rehearsal, the one known image suggests that the robot did not seem complete by that time, with not all the legs being fitted on in time. Ultimately, Hairy would not compete in Series 2.