Bertie is a smart red bus.
- Season 2 - Scrambled Eggs (cameo), Stop Thief! (does not speak) and Triple Header (cameo)
- Season 3 - Domeless Engines (cameo), The Runaway (mentioned)
- Season 4 - Light Work (cameo),
- Season 5 - Rusty to the Rescue (cameo) and Steamroller (cameo)
- Season 6 - Thomas and Bertie and Donald's Duck (does not speak) and Thomas, Terence and the Snow (does not speak;not named)
- Season 8 - Edward's Exploit (cameo),