He was originally hired to voice Diesel 10 in Thomas and the Magic Railroad. But US test audiences thought he made the character sound too frightening for little children so he was replaced by Neil Crone. Keith's voice was still included in some of the trailers for unknown reasons. He also did the voice over for the Bluebird Toys set commercials in Australia. Other credits include "The Adventures of Blinky Bill" and "Popeye's Bilgerat Barges".