John gets roughed up by some thugs; Kai connects with Butchie; Vietnam Joe brings Dr. Smith a new patient; and Shaun's adult-film-star mother Tina arrives in Imperial Beach.

Bill gets a strange mandate from Zippy; and Tina lets the Yost family know that she is back in town.

Butchie puts together a reunion between Shaun and Tina; and John helps Bill and Cissy face their pasts.

Linc's Stinkweed reign is challenged; Dwayne eyes Shaun's online future; Dr. Smith tends to Palaka.

The locals in Imperial Beach worry about Shaun after a cryptic warning from John.

Mitch seeks helps south of the border; Cissy organizes a search party to find Shaun; Bill loses a trusted source of information; and Palaka's gift ends up with an unintended recipient.

In the first-season finale, Butchie and Kai have a joyous revelation; and Imperial Beach plays host to a makeshift parade.