On the Moon, the Doctor meets Professor Dale of the Peace Party, who shows him around. The Doctor tries to get Dale to trust him and include him in his plans for escape. On Earth, Jo of course recognises the Master immediately, and surmises correctly that he was behind the Ogron attacks. The Master found out about the Doctor and Jo's presence when the Ogrons brought him the TARDIS. Given the unsavoury choice of going with the Master or staying in her cell, Jo agrees to go with him to fetch the Doctor.