Luke is an Irish narrow guage engine. When he first came to Sodor, he hid up in fear that he would be sent away from Sodor from bumping a yellow engine into the sea, but with Thomas and Victor's help, he was able to learn the truth, and now works happily on The Thin Controller's Railway.
- Season 1 - Luke and the Special Party
- Season 2 - Don't Be Late!, Trust Paxton (mentioned), Duncan's Predicament, and Welcome Smudger
- Season 3 - Duncan and Luke, Duke's Final Run, The Truth is Revealed, An Earned Apology, and Bike Care (cameo)
- Season 4 - Mud and Roads, A Second Language, Welcome Back, Jack!, and Thomas Does His Thing
- Season 5 - The Fastest Engine in the Hills, Diesel Domination, and Nigel
- Season 6 - Triple Trouble (mentioned),