Part FourSeries Episode Number: 579
World Premiere: Tue 30 Mar 1982 - 6:51pm BST [BBC One: Not Wales] (United Kingdom)
First Broadcast: Wed 22 Apr 2015 - 8:30pm EDT [Retro TV]
Running Time: 24 minutes 30 seconds
8.10 Million (UK)
Chart Position: 64 () (UK)
The Master's TARDIS is repaired and the Doctor must follow him back to 20th century Heathrow, once he has rescued all the passengers and crew from both Concordes.