The Doctor has just regenerated but things haven't gone as smoothly as they usually have. In order to protect himself and the universe, he decides to go into exile. However, he just so happens to pick a planet where a sinister plot is unfolding. This week, Paddy and Tricia follow The Doctor and Peri as they are forced to aid in the rescue of a pair of abducted boys. Can The Doctor recover in time to save the universe from The Twin Dilemma?