S1 E4 Gronpoly

 The main 3 look through a telescope-type thing in the attic. Josh asks his dad to bring him to a “alien autopsy”, but he declines.

Robbie gets her first job, but her work outfit is embarrassing and her boss is a jerk.
Josh goes to the alien museum anyway and sees 2 workers drop a Gronpoly ship. He meets an alien specialist who works at the museum. Robbie has a talk with her boss, who is revealed to be one of her classmates.

Robbie gives Allen his first ice cream, but it activates his Xelan powers. Josh and his dad build a model spaceship until Mr. Stevenson has to leave, and Josh hears something at the door. Robbie walks in, sees the house in destruction, and finds an alien terrorizing the house. Josh thinks it’s cool that so many aliens are at the house.
Allen identifies it as the Gronpoly, which keeps eating the furniture.

Josh catches the alien in the refrigerator, and Allen says it’s only one part of the alien, the Gron. The Poly ended up in Robbie’s backpack. Robbie talks to her boss about how he should treat her better. Josh talks to his dad on the phone. The Poly steals the store’s food and her boss gets mad, and the boss sees the alien and passes out. Allen combines the 2 aliens when Robbie brings it home.

Josh stimulates the alien with silly string or something until he sneezes out all the furniture. Allen talks to an alien exhibit at the museum using Xelan powers until Robbie finds the ship. The dad comes home and they rush to put the alien in its ship, which they do. The dad gets suspicious about the fish tank in the refrigerator. Robbie and Allen talk in the attic. Shaw enters the museum at night and confirms alien activities.