It is the time of the Second World War, and all is not well at a top-secret research base in Greenland. The British have been testing a new device which could bring about a swift end to the war with Germany - but the trials have gone disastrously wrong. When the Professor and Ace arrive, they encounter an isolated community not only under threat from its human enemies, but stalked by a horrifying menace with a voracious appetite for survival.

Millanno: a holiday planet of extreme wealth and extreme leisure - on one side. The other side of the planet teems with politicians, administrators, and also criminals. When the Professor and Ace decide to take a holiday, they are unwillingly pitched into a battle for supremacy on the planet. Separated and suddenly finding themselves on the lost and lonely Isle of Prosperity, they must find each other. But standing in their way is the determination of a mysterious figure from the past to reclaim the directorship of the planet.

Travelling on the luxury train service to Vienzza, The Dominie and Alice discover that one of their fellow passengers is a killer: but which one? As time runs out and the body count begins to rise, the Time Travellers realise that things may not be all they seem.

The death of a nameless traveller on a flight to the volcanic Hedistic islands would seem to have been natural. But when his young friend starts her own murder investigation, she uncovers a plot which threatens the safety of the entire planet....

Ace is apparently killed and her dead Nan appears to help her cross over to 'the other side'. Faced with her own internal demons, how long can she cling to life? And what is 'the other side'? The final track of this download is a 10-minute edition discussion with Bill Baggs and Sophie Aldred, Editor Alistair Lock and Assistant Producer John Ainsworth.