Sophie and Millie come across a mysterious device that shows them encounters of the past with some disastrous consequences to follow when they begin to believe they can control it...

Hosted by actor and historian Sir Tony Robinson, this one-off special tells the powerful and moving story of five men, all members of a unique volunteer army – the Sheffield City battalion – as it recounts the soldiers’ last days, leaving their homes and loved ones to go and serve alongside their friends and neighbours, completely unaware of what lay ahead of them. Central to the programme is the ...