"Do you want me to kill you? 'Cause that's fine with me."
He looked down, pretending to be nervous. Maybe there was a way for him to use the Doctor to his advantage.
"I've changed my mind. I want...What you offered me. Two of us, travelling. Like the old days." He clenched his teeth, trying to relax as he talked. "Koschei and Theta."
He knew the Doctor would believe him. He always did.