Long Lost Friend

S18, E17: Its Christmas time on the Island of Sodor and Gator is coming back after working in a land far away for a long time. He is looking forward to seeing his old friend Percy. When Percy hears that Gator is back he is very excited and immediately heads off to see him. But the two engines keep missing each other and soon they both begin to have doubts about whether the other one wants to see them after all.