A tree monster takes the form of a student in order to kill the student council. Also, Felix is forced into a situation where he must protect a boy that has wronged him in the past.

Jake and Felix must infiltrate Hayley's cheerleader slumber party in order to find out which girl is hosting a bug alien. Also, Stockey is nervous about attending his Troop class reunion.

While fighting a gelatinous cube monster, Haley and Jake accidently switch bodies.

Haley becomes suspicious when a mousy classmate suddenly gains status and power - which is revealed to be by controlling an invisible, subservient monster.

On Halloween night, The Troop has to capture the monsters after the security system breaks down and the monsters escape.

Jake meets his monster-hunting hero, but discovers he's out growing the ability to hunt and capture the ultimate monster he has been chasing his whole career.

A Troop from Japan arrives to share monster-hunting techniques with our Troop, but cultural differences complicate everyone's attempts at defeating the elusive Noctem.

Jake and Hayley discover that the hot Christmas toy, the "Ickie Doll", has been invaded by a Vapor Monster, turning the dolls into nasty, violent, living creatures.

When a veteran Troop member named Bianca Stonehouse replaces Mr. Stockley due to his dentist appointment, The Troop discover that she is a monster in disguise, there to help another monster escape and to find the real Bianca Stonehouse before its too late.

A strange Swarm monster causes everyone in town to behave perfectly, The Troop learns that perfection is overrated.

Felix's new friendship with Gus creates a rift within The Troop. Little does anyone know of Gus's secret plans to destroy The Troop.

Jake and Haley must pretend to be a couple in order to catch the Eris Fairy(Victoria Justice) that's been running around the school breaking up couples in love. Felix works furiously to trap the Eris Fairy only to realize how much he relates to her situation. In the end, the fairy apologizes to Felix and tells him that she likes him.

The Troop is in lockdown until they can figure out which one of them is really a monster.

While hunting a Vampire Moth, the Troop must alleviate the suspicions of two of their classmates who witnessed a monster fight, but cannot be Snarked.

When a group of part vampire/ part Hamster/ part Human monsters invade Lakewood, Jake must go undercover to infiltrate the group in order to find their lair.

Jake is pregnant with a baby Snark, which makes his neck look weird. A griffin is harassing local ranchers and Haley and Felix have to take it out.

After Phoebe unwittingly "adopts" a baby Dragon and Jake and the Troop must figure out how to return it before the mother dragon finds them first.

Jake and two other students attempt to stay overnight in an abandoned hospital rumored to be haunted by a Wraith.

When Haley and Felix are scratched by a Zylork, its venom makes them want to be eaten by the monster and Jake must save his friends from themselves.

Felix creates a robotic version of himself that is better at his life than he is, but evil. Hayley is bitten by a monster which gives her symptoms that make her seem very nerdy.

A Harvard-educated sponge named Dr. Cranius (voiced by Kelsey Grammer) is captured by The Troop. He then tries to manipulate the members so he can escape.

Mr. Stockley is the acting Principal at school and wants to the day to go perfectly to show off what he can do, but when an Oculypse escapes from HQ havoc is wreaked on the student body.

Gus is back from the mental hospital and he plans on destroying The Troop and taking over Lakewood. But in order to do he kidnaps Mr. Stockley, to enter headquarters and release all the captive monsters.