Tractor Tom

The first series featured Liza Tarbuck and James Nesbitt as Farmer Fi and Matt respectively, with Enn Reitel as the narrator.

When compared to similar shows at the time, the vehicles did not speak in any form and only communicated through their respective sounds (chugging for Tom, revving for Buzz, Rev, and Rory, and spluttering and wheezing for Wheezy; excluding the French dub) despite having mouths.

The major change for Series 2 was that the vehicles now spoke out loud through a cast of child voice actors, and had minor redesigns to add moving mouth parts.

Fi and Matt would also gain new voice actors and outfits, and new characters were introduced.

CITV re-airings of the first series were eventually edited to include the new voice cast although the animation remained the same (Meaning the mouths did not move when the characters spoke) and the credits were not edited for the changes.