Thomas & Friends S19E16 - Two Wheels Good

Spencer has to take the Duke and Duchess of Boxford to Castle Lochfor Lord Callan's birthday and he, Thomas and Bertie start boasting about which amount of wheels are best, but Spencer's valve gear snaps, so the Duke and Duchess decide to ride in Thomas instead, who gets stuck behind a fallen tree, then they ride in Bertie who gets a wheel flat after driving over some nails laying in the road, then Mr. Percival calls Harold the helicopter so he can take them to Castle Loch.