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.

• Carla Hall
• John Henson
• Ron Ben-Israel