Another adventure for everyone's favourite Time Lord. The Doctor (Tom Baker) and Sarah believe that they are back on Earth when the TARDIS lands near what seems to be a peaceful English village. But why is the local pub deserted? Who are the spacesuit-wearing figures with guns for fingers? And what does the mysterious return of formerly missing astronaut Guy Craven have to do with it? All is revealed when the Doctor discovers that the entire village is an elaborate dress rehearsal for an invasion of the Earth by the alien Kraals. This was the last story to feature the Doctor's companions Harry Sullivan and Sergeant Benton.