Peter Sam is a green narrow guage tank engine.
- Season 1 - Luke and the Special Party and Stuart's First Run
- Season 2 - Don't Be Late!, Duncan's Predicament, Welcome Smudger, and Sir Handel and the Ghost Engine (cameo)
- Season 3 - Peter Sam and the Snow, The Truth is Revealed, An Earned Apology, Bike Care, and A Happy Day for Alfie
- Season 4 - Trapped, Mud and Roads, and The Truth is Revealed
- Season 5 - High and Mighty, The Fastest Engine in the Hills, Nigel (cameo),