Stop That Bus!

S15 E13: Thomas feels sorry for Bertie so he takes him on a tour. Bertie loves the sights but then realises that he needs to go and collect a group of people and cannot be late. Thomas is having such a good time as tour leader that he does not listen to Bertie when he says he needs to get back. Will Bertie be able to make it back in time to pick the people up?