The Last Mabelcorn - September 7th - 8:30 PM ET

A new threat leads Mabel to venture into the enchanted realm of the unicorns. Meanwhile, Dipper learns an unexpected twist about the enigmatic Bill Cipher.

Roadside Attraction - September 21 - 8:00 PM ET

Grunkle Stan takes the kids with him on a road-trip to sabotage all the other tourist traps in Oregon.

*Chelsea Peretti (“Brooklyn Nine-Nine”) guest stars as Darlene.