It's Halloween, and Max is tired of staying home and missing out on the fun. So FX's trouble-making cousin XS takes the trio to Terrorforma, the spookiest place in the universe.

Ben videotapes Max's latest trip into space, and he blackmails Max into letting him come along on the next voyage in exchange for his silence.

Max's latest babysitter turns out to be Hoo Jipson, a famous outer space rodeo star.

Christopher the Plumber comes and dismantles A.B., taking everything but his head, and it's up to Max and FX to track him down and recover the parts.

While visiting Buckyland theme park, Max and company encounter a friendly family of rats who are desperate for food, and they in turn do what they can to help.

Max attends a film festival with himself as the main attraction.

The gang goes after the tooth fairy after s/he takes Max's tooth from under his pillow and doesn't leave him any money.

Max's constant crank telephone calls result in a long bill, and he has to work at an interplanetary phone company to pay it off.

After an accident, A.B.'s foot squeaks, so the gang travels to Ireland -- otherwise known as ""Leprechaun Land"" -- to find a good cobbler. The cobbler they find is a leprechaun named Blarney Fife, who is trying to keep the map to Leprechaun Land's pot of gold from a greedy sneak named Pete O'Moss.