Carrier Brownstein and Dakota Johnson also star in the faux doc-within-a-doc.
ET exclusively debuts a sneak peek from Thursday's episode.
LOL! On Thursday's episode, Fred and Carrie go to a party with a photo booth and Ross plays a photo booth expert they hire to ace the test. The eighth and final season of the quirky comedy airs Thursdays at 10 p.m. ET/PT on IFC.