Just the idea that someone could possess mind-control abilities is creepy, and now it looks like at least one of our main characters -- Olivia, a.k.a. "Olive" -- might be in that situation. The scene on the street with Nick gathering followers and taking them to the rooftop gave me goosebumps. Olivia was really in a tough spot. Either shoot the guy with the mind-control powers, or let everyone die.
It was a good call on her part. And darkly funny when one of the people launched themselves off the roof and crashed into the car below, leading Walter to quip, "I sure hope Agent Dunham meant to do that." It's indicative of the Fringe writers' ability to be both creepy and funny at the same time.
And it's finally getting back around to ZFT and William Bell (and how cool to hear Leonard Nimoy's voice at the end, saying "Do we know what triggered it?") But oy, that video that Walter was watching. I've known that someone experimented on Olivia when she was a child, but did I know for sure it was Walter Bishop and William Bell? I think this was the first time I had something definitive on that. And how does Nina Sharp fit into it? She must have been part of it from the beginning.
I'll leave you with Nick's chilling rooftop monologue to Olivia: "I think they meant for us to forget. I did what they told us. I waited to be called up, stayed fit, stayed focused, stayed ready, the call never came. It never came. That man with the glasses showed up at the hospital. He spoke all the old words. He said, they're coming, what was written will come to pass. He said he knew how to wake me up. I want to stop hurting people."