After Popeye claims that surfing takes little skill, he challenges Junior to a surfing contest to prove his point. Popeye discovers that there's a little more to surfing than meets the eye.

While helping Professor Whatasnozzle with a new invention, Junior and Woody accidentally drink a formula that makes them turn into monsters. While Junior and Francis's alter egos wreak havoc, Popeye and the Professor must administer an antidote.

When a hot-air balloon lifts off with her in it, Olive lands in a lost prehistoric valley. Popeye and Junior fly off to the rescue.

The kids' plans for Junior's birthday bash are nearly scuttled when he refuses to attend if Tank is invited, due to Tank's pranks at last year's party. The kids try to convince Junior to change his mind.

The kids meet Shellie, a new girl "from Down Under." Pretty soon, dolphins and fish start disappearing from Sweethaven. When Shellie let all the animals from Sea Park go, it calls for Popeye's spinach to round them up. The girl from "Down Under" turns out to be a mermaid.

Junior stows away on Redbeard's ship, but he gets more adventure than he bargained for when pirates sink it and take Redbeard hostage. Popeye and Junior must rescue Redbeard and escape from the pirates' island fortress.

A surf movie is being filmed in Sweethaven, and Junior gets the lead. Trouble starts when Popeye and Olive try to "help" the reluctant star, and Bluto and Lizzie scheme to get the role for Tank.

Junior doesn't have any money for Olive's birthday gift, so he rushes out to find a job. He ends up working for Bluto. The job goes well until Tank shows up and tries to undo Junior's hard work.

Olive volunteers to play in the father-son baseball game after Popeye hurts his arm. Despite her enthusiasm, she's a poor player. After a late-night practice, Olive improves her skills, but she's almost too tired to play.

When Junior finds a wish-granting genie, he begins to act like spoiled Tank. He makes the genie make Woody lose a bike race so that he can win. After that none of his friends will talk to him, and he learns a lesson in sportsmanship. Junior sets the genie free and gives Woody the trophy.

Junior and the gang find a treasure map and head out in Popeye's boat to find it. Various underwater dangers confront them. But the worst peril comes from Tank and his pals, who want the treasure for themselves.

At a town picnic, a competition pits the families against each other. Bluto and Tank will do anything to win, but their schemes all backfire. The real winners surprise everyone, including themselves.

After losing a volleyball game to Junior, despondent Woody is kidnapped by the Goons and taken to Goon Island. Fearing that he's in danger, Popeye and Junior go after him and end up in hot water themselves. Woody finds out that he's a winner when it counts as he helps rescue his friends.

Tank and friends sabotage the beach to get people to visit Bluto's Wave Park. When Popeye finds out, he and Junior set out to clean up and teach Bluto a lesson. Then Tank fools with the park's computer, which causes a tidal wave that clears the park and sends everyone back to the beach.

Poopdeck Pappy, Junior's grandpa, makes an unexpected visit. Junior is delighted until Pappy speaks to his class about their less than noble family tree. Junior's embarrassment is assuaged when Pappy rescues the whole class from disaster during a field trip.

When Polly helps a hurt sea monster, it develops a crush on her. The monster is so lovestruck, he follows Polly around and is an easy target for Bluto, who captures him. Polly and Junior head out to sea to rescue their friend. All's well when the monster finds a female sea monster to love.

On their anniversary, Popeye and Olive argue. As Junior and Dee Dee try to reconcile them, they recall the story of their wedding that almost didn't happen. Popeye and Olive realize their love for each other in time for their surprise party at Wimpy's.

When Junior stumbles on a mermaid figurehead, Bluto and Tank take it from him. For once, Popeye counsels Junior to give in to Bluto. When the evil Sea Hag appears out of the fog to demand the mermaid's return, Junior ends up rescuing Bluto's yacht party.