Interesting episode with an unexpected villain! Enjoyed "Seven Days a Week" more than anything in this episode. Also Scooby being adorably goofy! The scene where Scooby was dancing with the caveman was funny but also a little...creepy. The caveman's snarls were repeated at some parts. I know it's cartoon we're talking about but how did the caveman got out of the same little hut that the professor walked in?! I was taken by surprise with the modified intro which I suppose is for season 2 of "Where Are You".