The Doctor and Liz Shaw investigate a disturbing incident in the quiet Norfolk village of Huncleath, involving a vanishing Nazi soldier. Is time travel technology to blame? And what is the link between the disappearance of the village's wealthiest resident, Francis Teeling, and anti-war campaigners in Cambridge? As the Brigadier mobilises UNIT, a secret branch of the British military has serious concerns about UNIT's scientific advisor - Dr Elizabeth Shaw. In the ensuing struggle, Liz must make connections with her past, consider her future and fight against both incarceration and an unusual alien weapon. And try as he might, the Doctor may not be able to help her!

CAST: Tim Treloar (The Doctor), Jon Culshaw (Brigadier Lethbridge-Stewart), Daisy Ashford (Liz Shaw), Tom Bell (Brian Sherborne), Imogen Church (Bryony / Sabini / Florrie), Jason Forbes (Lincoln Hall), Georgina Hellier (Denise Morris), James Howard (Colonel Matthews), Yasmin Mwanza (Sylvia), Issey Walton (Glenda Symonds), Keith Wickham (Ken Sharp / Professor Buchanan / Captain / Francis Teeling / Nazi / Computer Voice / Minister). Other parts played by members of the cast. Brigadier Alistair Lethbridge-Stewart (c) Haisman & Lincoln and used under licence. With thanks to Hannah Haisman and Candy Jar.