It is August 1973. The International Electromatics incident is still fresh in the memories of the Brigadier, Captain Turner, Sergeant Walters and Corporals Benton and Tracy – not to mention snap-happy Isobel Watkins and UNIT’s recent recruit, Major Branwell.But the hot summer and Donny Osmond aren’t the only things distracting everyone at Waterloo HQ. There’s a steady stream of intriguing incidents, and some internal dramas, to keep them all on their toes.Operation Fall-Out contains eight new linked UNIT stories, featuring alien incursions, strange deaths, plague, problem-callers, nuclear disaster, and a bit of good old filing and admin work.But who is at greatest risk, and where do the biggest dangers lie?Features stories by Gary J Mack, James Hornby, Jamie Hailstone, Doris V Sutherland, Tessa North, Matthew Griffiths, Matthew Kresal and Tim Gambrell.