Part ThreeSeries Episode Number: 516
World Premiere: Sat 10 Nov 1979 - 6:02pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 31 Aug 2001 - 10:30pm CDT [Prairie Public Television]
Running Time: 23 minutes 55 seconds
10.20 Million (UK)
Chart Position: 36 () (UK)
In the pit, the Doctor establishes contact with the creature and begins to suspect that all is not as it seems.