Peter Davison, Janet Fielding and Sarah Sutton reprise their roles as The Doctor, Tegan and Nyssa, in a run of stories following on from 1983's adventure The Arc of Infinity. Reunited with the Doctor and Nyssa, Tegan joins them on a trip to Amsterdam's Rijkmuseum to see a new exhibition of the work of...
The first message sent to Tom Thorne's phone was just a picture - the blurred image of a man's face, but Thorne had seen enough dead bodies to know that the man was no longer alive. But who was he? Who sent the photograph? And why? While the technical experts attempt to trace the sender, Thorne searches the bulletins for a reported death that matches the photograph. Then another picture arrives.