Season 4, Episode 6
Wilson learns how to use a new piece of equipment. / Brewster and Koko get stranded.
Season 4, Episode 5
Wilson needs to guard the entrance to Safari Park while the Chuggineers work. / Everyone helps Koko when she can't slow down.
Season 4, Episode 3
A collapsed bridge traps Zack. Brewster must use all his craning skills to rescue. / Wilson's new Chug Patrol skills are put to the test.
Season 4, Episode 4
The Chuggineers get trapped by a flood. / Koko gives the Mayor an amazing tour around Chuggington.
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