Robert Wuhl (Alexander Knox) never went on to do anything of note
Do you ever go "what happened to them?" and look them up? I was surprised just how poorly he went post-Batman. His acting was okay, he sort of played the jealous coworker with the unrequited feelings fairly well. You'd think that he would have gone on to play this side-kick character again in something of note, given he was in the biggest movie of 1989.
Now I'm left to wonder how he got this big part in the 1st place? Was he a pal of Burton?