There's a New Mork in Town Mork & Mindy : Season 3 Episode 13

Mork is beside himself when he hears that Xerko is coming from Ork to visit him. Xerko turns out to be an arrogant and egotistical man and he wants Mork's job of reporting back to Orson. Xerko and Mork duel to see who will get the job.