A gym-themed challenge finds the cake artists scrambling to imitate exercise equipment. Guest judges: Nico Santos, Joel McHale and Ally Love.

School's in session with A+ cakes that look like they came from a college dorm. Guest judges: Chris Witaske, Kirby Howell-Baptiste and Chloe Fineman.

A retro challenge takes contestants back to the '90s with VCRs, Dr. Martens and more. Guest judges: Anna Camp, Melissa Villaseñor and Joel Kim Booster.

Bakers re-create the great outdoors with realistic cakes inspired by camping gear. Guest judges: Brandon Kyle Goodman, Cristela Alonzo and Kate Flannery.

From frosted toilets to fondant toothpaste: Will a bathroom theme send the bakers' dreams down the drain? Guest judges: Charli, Heidi and Dixie D’Amelio.

A stressful semifinal brings sports-themed cakes — and a high-stakes double elimination. Game on! Guest judges: Jeff Dye, Chiney Ogwumike and Flula Borg.

With $75,000 on the line, the three remaining bakers face a final full of surprises. Guest judges: Jade Catta-Preta, Chris Redd and Taylor Tomlinson.