The Doctor has parted with his previous companion, Ruby, and is again travelling time and space alone. He meets a potential new companion, Belinda, a human abducted from Earth by alien robots, but she only wants to go home. To the Doctor's alarm, every attempt to return her home fails: the TARDIS is simply unable to return to Belinda's time. The Doctor and Belinda have to go "the long way round" in order to return to Earth in May 2025...a date of huge significance for the human race.
