Thomas the Tank Engine & Friends 5x23

Toad the brake van is feeling glum as he is always seeing things sliding away from him and would like to go forward for a change. Oliver wants to help but doesn't know how. That afternoon, Oliver is pulling some trucks up Gordon's Hill, with Toad as his brake van. The trucks break away after a coupling snaps and now Toad is at the front of the train going forwards. Unfortunately he is on the Main Line with various possible disasters up ahead!