Rock-A-Bye Chatsworth is the thirty-eighth episode of Season 1.
Chatsworth is exhausted after working all day and wants to take a nap. It turns out to be harder than expected: the trainees playing keep him awake and Vee later asks him to do an extra run to Tootington. Meanwhile, Olwin is afraid of getting her paintwork scratched at the stone quarry while loading up. When she runs away, Vee asks Harrison to make her run. While showing off to Wilson, Harrison gets rocks in his system, causing him to make a loud snore after he goes to sleep. His snoring keeps everyone up all night, especially Chatsworth, who resides on the cabin next to him. In the morning, Chatsworth demands Harrison to go to the Repair Shed. The Chug-Scan finds the rocks inside him and Harrison has to do everyones work while the whole Chuggington sleeps.
- Old Puffer Pete
- Irving (cameo)
- Calley (cameo)
- This episode's title is a reference to the song "Rock-a-Bye Baby".