Then came the distinctive wheezing, groaning noise that Turlough recognised as the ship coming in to land. 'Where are we?' he asked the Time Lord.

'I won't know that until we've fully materialised,' the Doctor replied.

'You don't even know . . .?' Turlough tried his best to keep the scorn out of his voice.

'Well, that's half the adventure . . .' the Doctor enthused.