S02:É10 - S02:E10 - Rocket's Return

When a time machine appears to crash-land in the village, around the same time a stranger comes to town Rocket soon becomes convinced that Billy is an ageing time-traveller and is here for a reason. Especially when he saves them all from a rampaging bull. But when Jade realises that Billy is wearing the same angel wing badge as him - she realises Billy must be Rocket from the future! However when they confront him the truth comes out - Billy is actually Sarah's birth father and he is here to see if he can make amends. They finally meet and Sarah gets the hug she's always wanted.