The Sub-Mariner returns, but this time he needs help to defeat Attuma, who has taken over Atlantis. While Reed, Susan, and Ben head off to help free Atlantis, Johnny stays behind and faces an attack on the city from a giant mutant whale.
The Turtles must rescue the president before he loses his head to a sinister figure from their past.
Jeremy wins a contest to take a flight in an armed fighter jet, even though it is Odd who entered him into the contest. However, just before takeoff, X.A.N.A. possesses the jet and sends it to destroy the factory and kill Jeremy by forcing it to crash. As it closes in, Aelita, Odd, Ulrich, and Yumi struggle against William, who devirtualizes them one by one in his attempt to throw Aelita into the Digital Sea. Ulrich is the one to come out on top in a blade to blade fight with William, and Aelita is able to deactivate the tower. A return to the past is launched before the factory is destroyed, and Odd gets his chance to ride in the jet afterwards.
Kaz tags along with Tom hoping to get a new scan of his hero, the mighty Maxxor. Their quest takes the two friends across Perim, where they are caught in the crossfire of a volcanic battle, then brave a treacherous trip through the ghastly Gloomuck Swamp. As Tom and Kaz close in on their goal, they are shocked to learn that the greatest peril they face is Maxxor himself!
Lucy persuades Lee to pretend to be gay after she lies to a business acquaintance Guy, who she was told is gay himself, by telling him she lives with a gay flatmate to prove she is not homophobic. However, Guy soon starts to get suspicious and tests Lee's sexuality by taking him to a gay bar. Later, Guy overhears Lee saying to Tim, who had started to think Lee was gay, that he is not gay. When Lucy then explains to Guy what happened, he reveals he is not gay and he and Lucy kiss.
The owner of a horse farm, with a business in training student boarders to compete horse-riding competitions, seeks the aid of a Shambhala practitioner to clear the property of trapped spirits.
Jen's attempt to throw a successful dinner party don't go exactly the way she was hoping. The evening isn't a total disaster for everyone, though, as Richmond meets the woman of his dreams.
Shawn and Gus find themselves trying to outwit a bounty hunter when Juliet asks them to find a suspect who escaped from her custody. The problem is, once they find him, Shawn believes his claims of innocence, meaning they not only have to capture him, but prove he's been set up.
Whyatt is in big trouble because he messes up Jack's room accidentally. The Super Readers travel to the Goldilocks and The Three Bears book. They discuss the book and Whyatt learns how to fix his mess.
Eric Nishijima is using a particle accelerator to wipe out the contractors. Amber gathers numerous contractors to destroy the accelerator, and dolls to be used for some other unknown reason. Nijishima is related to the Syndicate as he places a phone call to eliminate Hei and his team. Amber sends a message to Hei via Wei, telling him to meet her in the Gate. Hei agrees and thus Huang, Mao, and Yin, agree to assist Hei to infiltrate Hell's Gate with Wei's guidance.
Big Bird and Elmo are excited, because they've got a special song for two friends, which they are. They count each other, and sing "One and One Make Two." They almost sing it again, when Abby Cadabby appears in a poof, and asks to join them. Suddenly, Big Bird realizes the song won't work this time, because it's a song for two, and if Abby joins them, they won't be two anymore, but three. What to do? Abby suggests making herself disappear, but that turns out to be not such a good idea. The three friends decide they should ask Gabi what they should do. They explain their predicament, and Gabi suggests they sing a song for three instead of two. What a great idea!
When Monk suffers from insomnia, he ventures into the night and stumbles upon a murder.
Andre encounters a Neuro from his past that was chipped, but he learns that she has regained her abilities and she has a grudge.
Dennis joins up with an environmentalist group, but his altruistic intentions quickly sour when he's snubbed by the activists. Dee and Mac decide to raise a baby they find in the dumpster, but quickly find out that it's not nearly as fun as they thought it would be, and Frank and Charlie take the concept of recycling a bit too far.
Mac, Dennis and Dee try out for the Philadelphia Eagles. Also interested in becoming an Eagle is Liam and Ryan McPoyle's brother, Doyle.
Continuing on their way to Hearthome City, Ash and his friends take a side trip to get an upgrade for Dawn's Poketch. Unfortunately, they ended up getting trapped in a dangerous maze, courtesy of Team Rocket.
Princess Pea and Red are paired up in a potato sack race. The only problem is that they can't decide on what speed they want to go. The Super Readers travel into the Tortoise and The Hare book. They discuss the book and learns about winning isn't always about coming in first.