5x11 - The Flying Doctors

Jacko is babtizing a baby who is ralated to Sam. Afterwords Sam discovers some burnmarks on Jacko's hands. He is taken to hospital and diagnosed with leprosy. He can be treated but everyone is upset and stays away from him. He gets sad and flies away without telling anyone. When they find out and try calling him on the radio there's no answer. Geoff and Sam follows him and manages to locate him. They talk to him and soon Father Jacko is himself again!