Aunt Miriam and Lou were not nice to each other. They always did and acted like Angelica and Tommy are today. Tommy and Chuckie go in the bathroom and find a hair dryer, a radio and a wig. They think Aunt Mirian is an alien and investigate.

While Didi and Stu go out, the famous Dr. Lipschitz babysits Tommy and Chuckie. The babies wonder about him and accidentally reveal him for the phoney that he is.

Angelica and the babies are kidnapped by an alien ship and find out about their parents - they're all aliens, including Grandpa! Tommy and the babies search for a way to get out and meet a dude that knows the ways out. He takes Angelica and puts her in the middle of a deserted place.

Grandpa comes out of the supermarket with Tommy and puts him in the back of a car for a moment. When he returns, the car has vanished with Tommy in it. Two women took Tommy as a son and Grandpa tries to take him back.

Trying to be just like Spike, Tommy takes off his clothes, and entices the other Rugrats to do the same, while Stu finds a way to keep Tommy's clothes on.

When Spike suddenly runs away, Tommy is sad. So Stu and Didi try new pets. The poodle is too mean, the gerbils have ran away and Grandpa Lou squished the spider. Will Spike come back or will he never come home?

After getting sick as a result of eating too much cookies, Angelica swears off them, depending on the other Rugrats to keep her away from cookies.