An ocean theme sends bakers into the deep to make seascapes, aquatic creatures and salty-sweet flavors; the guest judge is chef-restaurateur Richard Blais.
Geeky science-themed challenges get the creative juices flowing -- along with oozy zombie "blood"; the guest judge is actor and sci-fi lover Colin Hanks.
The contestants serve up sweets with summery flavors that evoke the great outdoors; the guest judge is "Wet Hot American Summer" creator Michael Showalter.
The baking teams pour buzz-worthy ingredients like coffee, honey and alcohol into amazing edible creations; the guest judge is pastry chef Mindy Segal.