ROMANA: Back to the city? UNSTOFFE: Garron! The Doctor said he'd go back and keep an eye on the Graff. THE JETHRIK!!! GRAFF: LEAVE US!!! TO ME, TO ME!!!! GARRON: Oh. DOCTOR: The first segment.
Plan: A: The Doctor; Q: Who returns to the city to keep an eye on the Graff? A: Garron; Q: Who steals the tracer? A: the first segment; Q: What is Unstoffe searching for? A: the tracer; Q: What does Garron steal from Romana, K9 and Garron? Summary: The Doctor returns to the city to keep an eye on the Graff, leaving Romana, K9 and Garron to search for Unstoffe and the first segment. However, Garron double crosses them and steals the tracer.