Little green beings from another world, land their craft and walk to their visitation destination. Unbeknownst to them, a dog within the house has heard their doggy door entry attempt and prepares a Martian attack.
Somewhere in a laboratory, a scientist documents the ability of a goldfish in a bowl, to complete a maze with cheese as a reward. Lab rats in a maze also attempt to reach the cheese. The result is a puzzled goldfish (and scientist).