Welcome to Thomas the Tank Engine Answers. What would you like to know?

BoCo hadn't appeared since season 5. Since the TV series originally relied on most diesel engines being mean, evil, rude and obnoxious (save for Salty, Rusty, and Mavis), unless they want to introduce a genuinely nice and hard-working diesel engine (such as BoCo, Derek, or Bear from the Railway Series), BoCo's chances of returning are rather slim.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.