The Doctor has been behaving suspiciously lately, and the Brigadier has been having him followed. He asks Liz to find out what's going on. Liz talks to the Doctor, and he is close to telling her what he's been doing, but the Brigadier walks in, interrupting them. The Doctor leaves, and Liz angrily tells the Brigadier what he's interrupted, but he tells her they're going to Milton Bradbury. The Doctor drives to Milton Bradbury, only to find it cordoned off. The Brigadier and Liz arrive, and the Doctor confronts the Brigadier. After some angry words, the Doctor leaves, accompanied by Liz.