That was the best episode in years, and I don't mean it in the "it sucks lately" sense, I mean it in the "it fucking rocked" sense.
Also, I almost teared up when Randy said "HEY THERE CHILDREN".
Randy episodes are usually among the best.
I gotta say, however, while I thought they stretched the Mysterion thing on too long over three eps (and did the Kenny bit to-literally-death), the Cartman-Chulthu bits last week were gold.