“By the way," said Tegan, suddenly very self-conscious. "Thank you." "What?" "You were prepared to give up everything for us." The Doctor just smiled and stood up. "Oh, come on!”

“I'm hard to get rid of." He smiled. All Tegan's suspicions about the boy came flooding back. "So it seems," she replied icily.”

“Don't interfere!" The Doctor silenced her angrily. "I cannot will my own destruction.”

“Mawdryn stared at the Brigadier with such a look of pain and longing. For a moment the old soldier's mind went back thirty-five years to his first taste of action as a young lieutenant in Palestine, with his platoon badly shot up by terrorists, and he remembered the mangled conscript who screamed at the officer to take his rifle and kill him.”

“The bemused Brigadier shook his head. "You and that TARDIS.”

“The Brigadier had no wish to shake hands with the improbable young man in the ridiculous frock-coat.”

“I said, "Thank you. Go the Saints. Goodbye." Go the Saints; I'd said it. The first time. It felt like...coming out.”