Part One
Series Episode Number: 386World Premiere: Sat 25 Jan 1975 - 5:36pm GMT [BBC One] (United Kingdom)
Running Time: 24 minutes 58 seconds
9.40 Million (UK)
Chart Position: 27 () (UK)
Recorded on Mon 28 Oct 1974 in TC3
The TARDIS arrives in the far future on the Ark space station where mankind's survivors are in hibernation. Sarah is accidentally placed in suspended animation.