After learning that local TV star Miss Sally will visit Oz, Augustus Hill exclaims, "next will have Seinfeld in here." This was an in-joke after Jerry Seinfeld starred in a sketch on SNL where his TV character was transfered to Oz. The sketch was filmed on the Oz set complete with several of the main characters.
All of show's seasons have eight episodes, except the fourth season which has sixteen episodes. Originally, "You Bet Your Life" (ep. #4.8) was the fourth season finale. But the production on the third season of HBO's most popular show, The Sopranos (1999), was running behind schedule and delayed the season premiere. So a few months after the original season finale, HBO ordered another eight episodes of "Oz" rushed into production to fill the time slot.