I think I might just become very unpopular. Sure, it was a great episode of a great series...but I didn't find it particularly stellar or brilliant, especially after "Invisible Hand." Honestly, I cringed at Peter's flashback sequence to earlier in the day in the midst of his fight with Green Goblin. Who would do that? Not only that, but--who would have the time to do that? And it seemed almost as an excuse to awkwardly heighten suspense by a clumsy in medias res attempt, and it also seemed to proliferate some unneeded recycled fight scene animation. Also, I thought the "mystery" with Harry's drinking of the formula is handled rather kids' show-clumsy, as well. Yes, it's a kids' show. Yes, I'm sure the younger audience found it very interesting, and I know that older fans would be at least momentarily baffled, perhaps. But that doesn't excuse a lazy execution. It just felt overly hyped.
Now, I'm not saying that it was a bad episode. The action sequences were great. The development of the Peter-Brock, Peter-Gwen, Peter-Harry, and Peter-MJ storylines was excellent (I would say that Flash's dialogue was too corny, but it fits his character well). A nice execution of the Green Goblin fight sequence, as well. And I liked his use of Tombstone's own thugs against the Big Man.
The story was solid, the action was great...but...the execution was sometimes lacking, especially in light of past episodes. I give it an 8 out of 10.