John Leeson reads this exciting novelisation of a TV adventure for the Fourth Doctor, Romana and K9. Some time ago the White Guardian, one of the most powerul beings in the Cosmos, set the Doctor an urgent task to find and reassemble the six segments of the Key to Time. Having successfully retrieved five of the segments, the Doctor and Romana arrive on the planet Atrios in the middle of an atomic war. There they must search for the last, most vital piece of the Key. However, sinister dangers await them in this final stage of their quest. The actions of the Marshal of Atrios, operating under a mysterious influence, look certain to bring about armageddon for them all. John Leeson, the Voice of K9 in the TV series, reads Terrance Dicks's novelisation of the 1978 TV serial by Bob Baker and Dave Martin. Duration: 3 hours 50 mins approx. (P) & © 2019 BBC Studios Distribution Ltd Text © Terrance Dicks, Bob Baker and Dave Martin 1980 Reading produced by Neil Gardner Recorded at Ladbroke Audio Ltd Sound design by Simon Power for Meon Productions - www.meonsound.com Executive producer: Michael Stevens TARDIS sound effect composed by Brian Hodgson Cover illustration by Bill Donohoe