After his usefulness came to an end, they decided to replace him with his son, Plantagenet, who they had also taken prisoner. Shortly after being detached from the machine, Revere died. Before Plantagenet could be fully attached, the Fifth Doctor used one of the machine's wires to stun the Gravis with the effects, immobilising all of the Tractators. Together with Brazen, the Doctor pulled Plantagenet free. As they turned to flee, Turlough, suffering from the awakening of an ancestral memory, approached the machine.