? The Doctor pilots the tardis while Gregson asks him certain questions, including where in time he has been. The Doctor replies such things like he was at Chernobl. The Doctor then speeds up the tardis which flies crazy. Once settled down the Doctor begins telling Gregson all about time and space. He gives Gregson odd definitions of regeneration and aliens he has encountered, calling the sontarons egg heads. The Doctor then asks if Gregson wants to have a go at piloting the tardis with Gregson accepting.