The Lisa Joyful in Hopeful Christmas Special

It's Christmas time in Olathe and a mission has been given to Swen, Luiz, and Yogurt to infiltrate a cult who celebrates the holiday 24/7 in search for the seeds of a tree said to be able to grow unlike most other plant life post flash. Their journey is a perilous one as many members of this cult have been driven mad, but they must carry on all the same.