Marty and Debbie love their new Friday night bowling league - but Debbie is terrible and the other two teammates ask Marty to kick her off the team. Meanwhile, when word gets out that the alien colony is getting a little too Americanized, Larry's father sends an ominous figure to possibly take over the mission.

Larry learns that he is pregnant and makes a decision about returning home or staying with the rest of the Zabvronians. Meanwhile, Reggie must also decide if he wants to stay himself or turn human, and the families see two new visitors arriving at the neighborhood.