When the TARDIS lands on Panenka, the Doctor, Tegan, Turlough and Nyssa discover a community falling apart at the seams - plagued by thefts, and mysterious disappearances among the 'piggybackers' who eke out a desperate existence on the comet.
"The Sunday Times top ten best seller. Thousands of lives have been saved by this spaniel. He is a best friend in dog's clothing. An RAF dog with his mossy feet firmly on the ground. A brave dog who has served his colleagues and his country with unstinting devotion. A dog in a million. This is the story of the partnership of Buster and Will, told by Will himself, describing how each came to save the other's life.