MSCL.com

Almost the entire Gummersall family is somehow involved in "quarterlife":

Devon Gummersall ("Brian Krakow" from "My So-Called Life") wrote episodes #4 and #5, his brother Josh Gummersall is co-producer of "quarterlife" and Devon's wife Majandra Delfino stars in four of the 36, eight-minute episodes. Also, Greg Gummersall's (Devon's and Josh's father) art is featured in numerous sets/scenes.

So those are the actual episodes 4 and 5 (not aired yet) rather than "part 4" and "part "5" of the pilot, correct? At first I was thinking that "Eric" was played by Devon Gummersall, but no, that's not at all true. I'm blaming that on my chintzy work monitor (but that's probably not true either).