When Benny wants to impress a girl at school, he does what any boy with a spellbook would do: he resurrects her dead dog, Puffles. But Benny uses a little too much potion, and Puffles isn't the only animal buried in that yard.

Erica and Sarah join the Whitechapel Devils cheerleading squad. Worried about what Erica may do, Ethan and Benny have to go "undercover" to stop her. But there may be more happening with the cheer squad than anyone thinks.

The yearbook team is coming up with ideas for this year's yearbook photos and decide to use an old camera that Benny sold them. Unbeknownst to Benny, Ethan and the yearbook team, the camera is a magic camera; it creates an evil clone of who evers photo is taken with the camera. The yearbook captain, Hannah, takes a photo with the camera, bringing out her evil clone, who goes around being heartlessly mean to the students, especially Ethan. When her evil clone grabs Ethan's hair, he has a vision and realizes what happened. Meanwhile, Benny takes a photo of himself with the camera to get revenge from the yearbook captain for rejecting his and Ethan's yearbook ideas. Benny's evil clone is then created from the photo. Once Ethan and Benny realize that Benny has an evil twin, they turn to Benny's grandma for help. She explains that the camera brings out the negative side of one's soul, once the photo is developed, and that negative side becomes a separate person--their twin. To destroy these clones, they must destroy the negatives. Benny and Ethan race to stop the evil Hannah from using the camera to take the class photo. Ethan manages to destroy all the negatives. Benny wrestles with his evil clone in the bathroom and destroys him just in time and all the clones that were created from the camera vanish.

Benny creates a love potion that affects Erica and Sarah. Ethan then finds a spell to reverse the love potion, but when he finds out that the love potion caused Sarah to have a crush on him, he decides to leave the reverse potion for later. However, things don't go exactly as planned.

Ethan, Benny, and Rory summon a Demon that takes over Sarah's body turning her into a crazy goth vampire that loves human blood.

Jesse is awakened from the dead and returns from the grave to get Sarah back but she refuses. Ethan and Benny prepare to destroy Jesse again. On the night of their high school dance, they arm themselves with weapons and try to fight off Jesse but Jesse bites Ethan.Then Jesse runs away. Sarah has a choice: save Ethan (which will in turn her into a full vampire) or let him become a fledgling. Sarah saves Ethan by sucking the venom out of his blood. Back at home, Benny's grandmother tells an injured and resting Ethan that he is still fully human. Ethan however feels terrible about what Sarah had to do--now she has no hope of ever becoming human again. Outside, Erica lets Sarah know that they are now best friends forever (literally) and that she will always be there for Sarah. Sarah seemingly accepts what she is and she, Erica and Rory fly away to their after-party.

When Mr. G unearths a mysterious crystal skull from his garden and brings it to school, he inadvertently summons an ancient Mayan Sky Queen who takes over his classroom. She entrances all the males in the school to help her prepare for a ritual that will unite her with the Sun King and end the world. At first jealous, Sarah and Erica soon realize it's up to them to save the school – and the planet – from the Queen's apocryphal plans. They ask themselves what Ethan and Benny would do and, with Grandma's help, make a plan to block the sun, channel the moon, and save the day.

When Ethan finally gets his learner's permit, he gets an old, rusty jalopy from a garage sale. Just his luck, it turns out the car is possessed by a bloodsucking backseat driver from beyond the grave! When the car starts attacking random people with Ethan behind the wheel, he has to figure out why, and stop it in its tracks - or forever be labeled a terrible driver. And go to prison for vehicular manslaughter!