Mork meets Sergei, a Russian immigrant, and invites him to live with them. After Sergei refers to himself as 'an alien,' Mork becomes convinced that he himself has to register with the government as an alien.
Exidor loans Mork and Mindy his decrepit cabin in the woods. Meanwhile, Exidor plans to become a rock star so he can obtain the title Emperor of Earth.
After ruining Fred and Mindy's night, Mork decides he wants to go back to Ork, so Orson shows him what the McConnells' lives would have been like if Mork had never arrived on Earth.