Deceit

'Didn't your mother ever tell you it was polite to knock?' the Doctor exclaimed, turning. 'Assuming you had a mother, of course.' He reached up, plucked his balls from Legion's body and stashed them inside his capacious pockets. He frowned, and looked around. One missing. Ah!' He stood on the tips of his toes and stretched a hand above his head. Bernice squinted through the air vents, trying to get a better look.

Hang on a tick, she thought. That can't be right. The Doctor's hand appeared to have vanished from the wrist up. His arm waggled, as if he were groping for something, and then his hand appeared as softly and suddenly as it had vanished: holding the fifth ball.

'You have knowledge of higher dimensions, I see,' Legion boomed.