Chuck Leavell and Francine Reed cover the Squidbillies theme song for cartoon’s season finale, which airs this Sunday at 12:15am ET/PT on Adult Swim. The keyboardist and blues singer are the latest musicians to join the illustrious ranks of Squidbillies collaborators.

The bizarre animated show, which chronicles the day-to-day existence of a family of anthropomorphized redneck squid, has already featured guest appearances from Widespread Panic (who also covered the theme song), Split Lip Rayfield and Drive-By Truckers. Gillian Welch, David Rawlings, Lucinda Williams, Bonnie Billy, Jimmie Dale Gilmore, Hayes Carll and Todd Snider also once appeared on the show as a group of singing forest animals.

You can watch a video of Leavell and Reed recording the theme song above.