Part OneSeries Episode Number: 576
World Premiere: Mon 22 Mar 1982 - 6:57pm GMT [BBC One: Not Wales] (United Kingdom)
First Broadcast: Sun 5 Jun 1983 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 56 seconds
10.00 Million (UK)
Chart Position: 26 () (UK)
Recorded on Mon 19 Jan 1981 in Television Centre 8
When a Speedbird Concorde disappears back through a crack in time, the Doctor takes another Concorde to follow its trail, unaware that a mysterious conjuror, Kalid, waits for him.