If you haven't cried watching Long Lost Family yet then we suggest you give the show another watch. Tonight Nicky and Davina are trying to reunite a 51 year old Londoner with the sister he hasn't seen since she was a baby. Will they be able to find her? Plus, we'll be meeting Polly, a woman who grew up in south London with her father in the 1950's and was forced to give up her baby at a young age. Can she finally meet the child she never wanted to say goodbye to?