The final datachip is on the ice prison planet Volag-Noc. Upon arriving, the Doctor is quickly identified as a wanted criminal, sentenced to 2,000,000,000 yrs and dumped in a cell with a damaged robot. Martha is taken to the Governor of the facility, a human named Gurney. He has the final datachip locked in a safe. As they discuss things, both Martha, when Gurney says nobody was to be locked in the cell where the Doctor is, and the Doctor discover that Gurney isn't the Governor, but one of the prisoners. Locke, the robot with whom the Doctor is sharing a cell, is in fact the Governor. The Doctor apparently shouldn't have been put in the cell in the first place. Upon being fixed by the Doctor, Locke decides that all the prisoners are irredeemable and orders their execution, giving Gurney a chance to shoot Locke and escape with the datachip. The Doctor manages to prevent the prisoners' execution.