Oh no! An ancient mummy is haunting the Fermentation Lab, munching on umami-filled ingredients like stinky cheese. This gives John Henson the idea for "umummy" desserts, and he tasks the bakers with creating sweet mummy treats that feature umami ingredients like red miso, aged parmesan, gochujang or soy sauce. Then, it's "bone appetit" for judges Carla Hall, Zac Young and Stephanie Boswell as the bakers get inspired by the lab skeleton, Skelly, to create Skelly's forgotten desserts, where they must use Halloween mini chocolate bars to create skeletal desserts.

No body part is safe when host John Henson welcomes 12 Halloween hopefuls to check into Hotel Henson and asks them to do a little detective baking by creating faces out of pie. Then, it's "blood in blood out" as they try to impress judges Stephanie Boswell, Zac Young and Carla Hall with blood spatter cakes.

The final bakers take on two very difficult challenges inspired by the past -- all leading up to a time-traveling monster mash! In the Dissection Lab, John Henson works on some gross anatomy, and he asks the bakers to create desserts with gummy hearts that will be "dissected" by judges Carla Hall, Zac Young and Stephanie Boswell. Then in the Quantum Physics Lab, John hops into a time machine and journeys to the ancient past for inspirations like medieval vampires and early aliens for time travel cakes. The best baker heads into the future with the Halloween Baking Championship title and the $25,000 prize!

John Henson has a problem in the haunted Paranormal Research Lab, and he's hoping to summon the spirit of Beetlejuice to help broker a deal with the other spirits. To butter up the ghost with the most, John asks the bakers to make black and white desserts using black and white ingredients. Then, John challenges the bakers to create Shrinker desserts that feature a tiny desert on top and large dessert on the bottom. In the end, judges Carla Hall, Zac Young and Stephanie Boswell banish one baker to the cyro-chamber.

John Henson catches a spirit doing some imaging in the X-ray room! The films the spirits have been taking of themselves are monstrous, and John wants the bakers to use these X-rays as templates for build-a-spirit desserts. Then, the bakers enter the lab basement where the portal to the underworld is kept locked behind a secure heavy door, but lately ghouls have been letting all sorts of otherworldly creatures out! The bakers make a portal entremet that reveals an otherworldly creature to judges Carla Hall, Zac Young and Stephanie Boswell.

The three remaining bakers construct a “Ghostembouche,” or ghostly version of a croquembouche tower. Then they face the final challenge of creating a bleeding zombie cake. When the bloodbath is over, the survivor is named Halloween Baking Champion!

John Henson asks the bakers to update the hotel's signature hedge maze by teaming up for a supersized challenge of hauntingly delicious maze cakes. If judges Carla Hall, Zac Young and Stephanie Boswell can eat their way to the center, they'll be treated to a baked prize. A supersized challenge becomes a double elimination as two bakers are sent to the 13th floor.

The bakers face decay when host John Henson challenges them to make moldy desserts that incorporate fermented ingredients. Then, judges Carla Hall, Zac Young and Stephanie Boswell smash desserts and dreams as they send one baker packing up to the 13th floor.

As John Henson lays a dead flower to commemorate the lost souls at Henson & Sons Carnival, he asks the finalists to make flourless desserts. Then, the bakers create cakescapes depicting new carnival attractions for the grand re-opening, where judges Carla Hall, Stephanie Boswell and Zac Young will name the Halloween Baking Champion!

Five bakers remain, and the creepy, dangerous donuts they whip up in the first challenge are a sight to be seen. Then, for the main challenge, the bakers dig even deeper into their baking skills with graveyard pumpkin desserts that are to die for. But one baker won't make it out alive.

The final four bakers take on a haunted house cake battle for the title of Halloween Baking Champion and the $50,000 grand prize!

A group of talented bakers enter the fortune-telling tent at the Circus of Dread in the pre-heat challenge. The competitors are tasked with creating tarot card desserts featuring blood orange, fig or passion fruit. The bakers then enter the Creepy Clown Hall of Fame in the main heat where they create impressive desserts that will land one of them in the finale.

John Henson kicks off the competition by revealing all the skeletons in his family's closet to inspire the eight bakers as they make scary skeleton desserts. The main heat is monster madness as the bakers conjure up monster-under-the-bed creations.

Bottom's up as John Henson asks the remaining five bakers to create lighting in a bottle by baking desserts based on classic cocktails. Then, the bakers must face their fears by frightening judges Stephanie Boswell, Zac Young and Carla Hall with sets of entremets that represent their worst nightmares.

Ten bakers explore the Chemistry Laboratory at Henson Labs, where the safety rating is negative 35. Lately, the spirits who haunt the lab have been demolishing all the beakers and petri dishes, so host John Henson leans into this devastation and tasks the bakers with creating broken glass desserts that feature sugar glass. Then, there's been a horrible spill in the Chem Lab, so John has a little fun with it and asks the bakers to create sinister bubbling desserts inspired by the toxic mess. Judges Carla Hall, Zac Young and Stephanie Boswell test their poison tolerance before sending one baker to the cryo-freeze.

Down to six bakers and it's time for a big, bad, monster mash. The bakers spook the judges with their sculpted scary treats and then mash up flavors and themes to create devilishly delicious desserts! But one baker's creepy concoction doesn't cut it and gets the axe.

Nothing says Halloween more than scary monsters, and in the pre-heat, the seven bakers must create creepy bite-sized monster treats. For the main heat, zombies attack as the bakers are faced with whipping up a zombie dessert that makes the judges hungry for a bite.

Five talented bakers have survived the Camp Devil's Food Lake killer, and host John Henson challenges them to make patterned roll cakes and frightening fault line cakes. The competitors will have to kill the cake game to get past judges Stephanie Boswell, Carla Hall and Zac Young.

Host John Henson's best friend, Puss in Boots, checks into Hotel Henson for three cat-tastic challenges. First, the bakers will honor Puss by turning a croquembouche into "croquem-boots" before redesigning an old school dessert to represent a method of death. Finally, two bakers on dessert death row must create cat-sized cakes that display Carla Hall, Zac Young and Stephanie Boswell's last wish desserts. Cats have nine lives, but one baker is about to get the boot.

John Henson turns up the heat when he asks the seven remaining bakers to set their desserts on fire by reinventing ​flambé classics. Then, the bakers have judges Stephanie Bowell, Zac Young and Carla Hall in stitches with realistic open wound cakes, and one baker is gutted when they're eliminated from the competition.

Host John Henson welcomes a dozen bakers to the Henson & Sons Carnival, where they're ready for the ride of their lives. First, they must layer a "tarot-misu" depicting the carnival's untimely demise. Then, the bakers scare up a new carnival mascot by designing creepy clown cakes for judges Carla Hall, Stephanie Boswell and Zac Young.

The bakers make desserts designed to melt after hearing John Henson's torrid tale of one of the carnival's most enthralling sideshow attractions, the Human Ice Pop! Then, a miscommunication spells the end for the sword swallower as the bakers create a dessert that swallowed another dessert to impress judges Carla Hall, Stephanie Boswell and Zac Young.

John Henson challenges the remaining bakers to create torta della nonnas that honor the matriarch of the Henson & Sons Carnival, the Tattooed Woman. Then, a mysterious swap smashes the Strong Man, which inspires the bakers to smash their desserts in front of judges Carla Hall, Stephanie Boswell and Zac Young.

The competition begins with a deliciously difficult pre-heat as the eight Halloween bakers weave spider web desserts with creatures trapped inside. In the main heat, wily witch hunter John Henson challenges the bakers to create melting desserts that reveal a Halloween item inside.

Inspired by a skull man, the bakers enter the graveyard to bring skull desserts to life in the pre-heat; for the main heat, the bakers must create a nightmare cake based on common nightmare themes; the bakers must face their fears to come out on top.