Delicately treading a fine line between hilarious and heinous, "World War Zimmerman" was a return to form for South Park, as it handily lampooned both the Trayvon Martin case and World War Z in one fell swoop.
It’s not a perfect episode. The World War Z thing bugs me. It doesn’t have the same lasting power as, say, using World War II-era Looney Tunes to mock Osama bin Laden in "Osama bin Laden Has Farty Pants." And some of the jokes that drive home the more serious points—like Zimmerman's quick receipt of justice once he shoots a white kid—lack the subtlety of the episode's best moments. But these quibbles are minor. There are moments that are as sharp as anything the show has done and even the throwaway jokes are pretty great.