as the fellow teachers Stef, Mary, and Michelle Critical Reception
The episode's primary conflict is sparked when Jack () provides Principal Durbin ( Patton Oswalt ) with unsolicited marriage advice. Jack's cynical approach backfires spectacularly, leading to Durbin being kicked out of his home by his wife. Feeling responsible (or perhaps simply cornered), Jack allows Durbin to stay at his apartment, only to discover that Durbin is an "obnoxious roommate" prone to sleepwalking and "sleep-screaming". [S1E10] Durbin Crashes
While Jack deals with his houseguest, his students attempt to aid him in his ongoing quest for revenge against his rival, Miles. The students try to obtain Miles' DNA—including hair and saliva—under the guise of a biology project, though their genuine interest in the subject matter frequently frustrates Jack, who famously refuses to teach them any actual biology. Cast and Notable Appearances as Jack Griffin Patton Oswalt as Principal Ralph Durbin Paula Pell as Helen Henry Demarcus Angela Kinsey as Brenda (Guest Star) as the fellow teachers Stef, Mary, and Michelle