Question: The Doctor says he's regenerated half a dozen times since last seeing Sarah Jane. This would mean he last saw her in his fourth regeneration. But surely this is wrong? They last saw each other when The Doctor was in his fifth regeneration, during "The Five Doctors."
Question: When The Doctor shows young Kazran his future, older Kazran touches his younger self. He did this without an explosion, however, in 'Doctor Who' it has been said that 'if you touch your younger self, it will create an explosion'. How did the older Kazran, in this episode, touch himself without an explosion?