Bertie is a bus.
- Season 1 - Bulgy's Dream
- Season 2 - Night Lights (does not speak)
- Season 3 - The Great Race, Special Bus Service and The Best Bus
- Season 5 - Lights (does not speak) and A Hole's One (mentioned)
- Season 7 - Rhyming Engines
- Season 8 - Flag Day and Squeaky Wheels (cameo)
- Season 9 - The Mystery Tour