There was a sudden flurry of motion, as Koschei shoved the Doctor aside, and twisted Jamie’s wrist to force him to give up the disruptor.

He then stepped over to the console, keeping the gun on them all as he, scooped up the circuits from his TARDIS. The Doctor sidled around the console drawing Koschei’s attention away from Jamie and Hakkauth. ‘Koschei –’

‘That name no longer has any meaning for me, Doctor. In time you too will call me Master.’

Koschei didn’t look round, so Victoria couldn’t tell whether his head was bowed in sorrow, or he was simply studying the console panel. ‘How long does anything finite last when compared to eternity? Time is relative, Miss Waterfield; sometimes it seemed I had always known her; perhaps we but briefly met.’

DOCTOR: Machines don't have secrets, only the people who control them.