Tommy Dawkins was in the woods celebrating the start of his senior year, when he was attacked by a werewolf. He became a Werewolf and seeks help from a unpopular student, Merton J. Dingle.

The Bookmobile rolls into town, and the librarian that runs this bookmobile strolls into cities, and turns patrons into books.

Sorority Witches went looking for new members and they found Stacey. Stacey decides to join them while Merton starts a android screenplay, but Tommy finds out about the sorority group and tries to release Stacey from their club.

25 years ago, a biology teacher falls into a swamp and he was transformed into a creature that resurfaces in the present time, but he still acts like when he was 25 years ago. His fiancé was about to marry Hugo, so Tommy, Merton and Stacey try to help out.

A new girl is in town, and Merton became friends with her. She was looking for a werewolf in the town and he thought Merton would know. Merton said he would not tell, but soon, her did and now he is in trouble because that girl was a werewolf slayer. While Merton was dealing with that problem, Tommy was searching to destroy a soulsucker who sucks souls as a door-to-door encyclopaedia salesman.

When Merton reads the Egyptian print on the tomb of Bud, he is released from death and uses a teenager disguise while in public to search for a queen, and destroy the world. Tommy and Merton realized that the mummy has arisen from the dead and is trying to make Stacey his queen.

A lycanthrope expert named Flugelhoff visits Pleasantville to help cure Tommy. But Merton and Tommy did not realize that Flugelhoff was trying to take the werewolf DNA and other components to create an army of werewolves to take over the world.

A mob along with Tim and Travis tries to track down the werewolf and kill it.

It's blood giving time for the Blood Drive, and Tommy decides to give blood. A group of vampires are in Pleasantville and Tommy did not like it when they were crowding around Stacey and pressuring her, so he stepped in. Later, Tommy found out from Merton that if he donated his blood, he gave wolf blood, so they returned to the blood drive to obtain the bag of blood, but when they got there, they found some vampires. They have to find someway to stall the vampires so they can get another plan ready to destroy them.

In an Indian chant given by Merton, Tommy releases his dark side, but he did not know that he was separated into two parts, light and dark. Now bad things from the dark Tommy are ruining Tommy's life.

A new substitute teacher is in the building, acting cool and everything, and Tommy finds out that this new guy, Mr. Dunleavy is a real werewolf And is THE wolf who bit Tommy. So Tommy hangs out with his 'dad' a lot. He ignored Merton's guess on that Mr. Dunleavy is evil.

Merton was going to throw a party but no one would receive his invitations, plus Tommy and his buddies make fun of Merton, hurting his feelings. When Merton confronts him about it Tommy starts to 'wolf out' but Merton won't help. But accepts Tommy's help after a big announcement Tommy makes in the cafeteria. So Tommy helps him out on the appearance of theparty. Meanwhile, Merton's sister is possessed by a demon from a locker under the school. Merton gets caught but doesn't get in trouble because of 2 things. They were happy he was trying to fit in, and they get a hot tub.

Tommy has a new puppy but he did not know he was the guardian of the Underworld, Cerebrus. He tries to deal with Sparky's problems like peeing Fire and he has to keep the angry mob out to kill the werewolf.

Lori gets Merton to revive her dead boyfriend but she did not expect what was going to happen next.

While Merton was writing a new song for a song competition, Death returns for Tommy, but Merton and Tommy review all the good deeds that Tommy has done over the past 2 seasons.

Merton's role-playing game comes to life, as he is transported to another dimension where he must fight a real fire-breathing monster. Afraid, he decided to return to Merton's world and retrieve help from Tommy. The only problem is that Tommy is acting like Gandhi. The monster, who was a Shederack enters their world, and Tommy, and Merton has to destroy it before he destroys Pleasantville, and so it cannot return to Ursula's world and rule it.

Merton notices an attractive Japanese girl at the factory and falls for her. She actually is attracted to him but tells him that they are too different so they can never be together. Merton misinterprets this and learns all about Japanese culture in an attempt to whoo her. This also fails to win her over even though she obviously likes him. Merton steals a kiss from her and then his trouble begins. Lori reveals that the girl is actually a cursed girl from a fairy tale and that anyone who kisses her will be killed by an evil 900 year old samurai. In an amusing sub-plot Tommy has to do community service at the Hungry bucket.