Australia, 1967. The Doctor, Ace and Group Captain Gilmore’s Counter- Measures Group investigate after members Allison Williams and Rachel Jensen discover an alien spaceship at a nuclear test site. Meanwhile, in 2029, Group Captain Gilmore is found in space, in suspended animation… Back in 1967, Gilmore’s assistant, Delafield, kills a strange snake-like entity attached to civil servant Pendry – killing Pendry in the process. When a severe storm hits the ICMG’s camp, Delafield and Jonquil Sharrow kidnap Allison and Rachel, leaving the others behind – but the Doctor engineers a speedy escape. With Ace’s assistance, he makes contact with the “snakes” – in reality, friendly aliens on the hunt for deadly-but-beautiful adversaries who have secretly engineered human history of their own ends for millennia. Now, with Allison and Rachel in danger, can they and their allies prevent a global nuclear disaster?

Peter Grant has being doing some research on an old case in the annexe of the Folly’s library. He has discovered that his mentor, Thomas Nightingale, befriended a man named Angus Strallen during the Second World War after Strallen witnessed Nightingale fell an enemy aircraft with a wave of his hand. The pair were reunited in October 1957 as they attempted to track down a dangerous murderer who targeted women: one Professor Uwe Fischer. The ex-Luftwaffe-pilot- turned-scientist remained one step ahead of Nightingale and Strallen at every turn, seemingly surrounded by powerful allies. With the detectives hot on his trail after his attempted murder of Asterid Bivalacqua, Fischer decided to leave London and head back to Cumbria. But returning to his day job at Windscale, an atomic reactor plant in the North West, could prove to be even more deadly for the unsuspecting people of Britain…