A British Airways Concord disappears on final approach. The Doctor, still reeling from the loss of Adric, becomes involved when his TARDIS miss-fires from its intended destination of London 1851 and appears at Heathrow airport. The Doctor follows the lost plane into the deep past only to discover he is part of an illusion. This forces him to ask the question: if there is an illusion, who is the conjurer?
Did You Know?
Tegan is always nagging the doctor to get her back to Heathrow so she could be a stewardess. They are now in Heathrow and Tegan stays with the Tardis instead of remaining at Heathrow and actually becoming the stewardess she always claimed to be but never really was. See more
Behind every illusion there's a conjurer. In this case I shouldn't think he went to all this trouble for our entertainment.