Brewster Makes Tracks / Back Up Brewster

S4, E201: Brewster Makes Tracks: The Chuggineers demolish an old cooling tower and Brewster cannot wait to see it come down, but an urgent job means he may miss the explosion.Back Up Brewster: Zack becomes trapped when an old rickety bridge collapses, prompting Brewster to use all his craning skills to lift him safely out of the high tunnel.