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“You did excellent today, Wilson. But on the last test, you forgot one crucial thing...”

Chief Wilson is the sixth episode of the fourth season.


Jackman sends Wilson to the Chug-a-Sonic Speed Track to do an assessment made up of three tests. The first one is some leaves on the track. He sends Calley to bring him Chug Patrol 5, which helps him blow the leaves away. His next test is an uncoupled wagon. He goes up to the wagon when he realizes that it leaked out oil on the track. He sends Calley to get Chug Patrol 8, which sands down the oil. He waits for it to absorb, then he vacuums the sand and oil. His last test is in the tunnel. He sees Skylar, who is broken down with wagons all over the track. He takes Skylar to the repair shed, and Morgan tells him to head back to Chug Patrol Headquarters.

Meanwhile, Brewster is helping Old Puffer Pete with some storage cabinets at the Drop and Load freight yard while Harrison keeps bringing more.

Wilson heads to Jackman. Jackman says he did very well on the first two tests but then alerts Wilson that he left Skylar's derailed wagons on the line without closing the line, which could cause an accident.

Old Puffer Pete gets tangled in chains that fell when he misplaced them at the Drop and Load freight yard. Wilson soon sees and closes off the track and untangles Pete from the chains. Jackman sees and is impressed. He tells Wilson that he could be chief of Chug Patrol one day too.


Rolling Stock[]







  • Pete's cylinders briefly clip through his running board near the end of the episode.
  • In the US credits, Morgan Deare is credited despite not voicing any characters in the episode and John Pohlhammer goes uncredited for voicing Irving.
  • In the UK BBC iPlayer credits, Warren Clarke is credited for voicing Speedy, despite him not appearing in the episode.