The Empty Planet: Part 2

Plot:

After Gavin has helped them escape Rani and Clyde reason that they have been left behind because,in a previous encounter,the Judoon decreed the pair of them should never leave Earth. The robots come back and eventually communicate in English,explaining that Gavin,who thought he was an orphan,is the son of an alien king and he is to return to rule his planet in exchange for everybody who disappeared being returned. Gavin is happy to go but Rani and Clyde have some explaining to do to their elders,who,in their parallel universe,thought that they were the two who went ...