I wonder why John Lovelady didn't perform Crazy Harry in that special. He had already performed Harry in the Valentines special, and he would perform him regularly on TMS, but in this pilot it was Richard Hunt. John Lovelady did perform in this special.
I find it a bit ironic when I see the openign scene, with Nigel telling Harry "No more explosions!" Both characters would be performed regularly by John Lovelady, yet neither was in that special (and ironicaly, Crazy Harry didn't speak n that scene).