Murdoch is the largest engine on Sodor.
- Season 1 - Repairing Old Slow Coach (cameo)
- Season 2 - Hank Goes Fishing, Stuck in the Mud, The Cement Works (cameo), and Tender Engines Don't Shunt!
- Season 3 - The Singing Woman (cameo), Tender Trouble (does not speak), and A Train for the Queen (cameo)
- Season 4 - Runaway Koby (does not speak)
- Season 5 - The Early Whirlybird
- Season 6 - The Secret At the Steamworks (does not speak), Triple Trouble, The Big City Engine,