DOCTOR: What happened to Dojjen? I have tried. In honour of this special occasion, the Great Crystal, the Great Mind's Eye, will for the first time be inserted into its rightful place
CHELA: No! LON: And rare? LON: And these? LON: Give in? NYSSA: To do with what? NYSSA: We've got to get out of here. TEGAN: The Doctor must not interfere. [SCENE_BREAK]
LON: What about him?
Plan: A: the Great Crystal; Q: What is the name of the crystal? A: prison; Q: Where does the Doctor find himself? A: Nyssa; Q: Who helps the Doctor escape from prison? A: Chela; Q: Who tells the Doctor about Dojjen? A: Dojjen's journal; Q: What does Chela give the Doctor? Summary: Possessed Tegan and Lon try to find the location of the Great Crystal. The Doctor finds himself in prison with only Nyssa to get him out while Chela tells the Doctor about Dojjen and gives him Dojjen's journal.