The corner of the Master's mouth lifted up in a sneer as River stole his screwdriver. The gall! Although he really shouldn't have expected anything less from a consort of the Doctor's. Especially one who thought she was in any way special due to that smidgen of Time Lord in her.

Whether she knew it or not, she was now marked, and if she had any sense that should worry her.

"Catch you later," he called out to her back, purposely saving his panicked struggles for after she'd left. The handcuffs, of course, were good. Too good. By the time the Doctor came running up the stairs and banged open the door, the Master was similarly out of breath but no closer to freeing himself.

He still managed to roll his eyes and attempt to save what little face he had left.

"Get a good look?" the Master arched an eyebrow, clearly vexed.