When ALF finds out that a local corporation is using CFCs that pollute the environment, he writes several letters of protest, all under fake names. When the corporation threatens with legal action, Willie goes over to meet with them only to have them try to buy his silence by offering him a high-paying job.
When ALF picks up a signal on the Tanner's radio, he realizes that it is someone trying to get in touch with him through Melmacian code. He cracks the codes and finds that it's two of his friends who want to pick him and take him to their new planet. He agrees to meet them unaware that the Alien Task Force is onto them.