With subplots involving guest stars Luke Perry, Peter Criss (from Kiss), Malachy McCourt, and others, the fifth season of Oz is weak at times, but series creator and primary writer Tom Fontana keeps a lot of characters in steady play, covering impressive dramatic territory after the relatively generous allotment of 16 episodes in Season 4. The series is clearly winding down here (the semi-musical episode "Variety" is a curious attempt to broaden the show's creative horizons, and works surprisingly well), and the outbreaks of violence now have a rather predictable and oppressive frequency. Anyone looking for "feel good" entertainment should stay away, but Fontana and the uniformly excellent cast maintain admirable depth of character and incident, including a tragic loss (in "Visitation") that resonates throughout the season. Extras are slim: commentary by Fontana and Dean Winters accompanies episode 8 (aptly titled "Impotence"), and like the fifth season itself, it's recommended primarily for devoted Oz viewers who've enjoyed seasons 1-4. --Jeff Shannon