Back at Fringe, Astrid arrives back at her desk to find it littered with a coffee cup and other bits of assorted detritus, and she wearily asks why no one respects her desk, and the moron in front of her cheerfully says, "You're too nice!" which should have made him the instant recipient of all the garbage. But there might not be any time for that, because there's suddenly an alarm going off indicating there's some shit going down in Central Park.
Back at Harvard, Walter, with Ella looking on, is marveling at the electralite device, and wishes he'd invented it (for peaceful purposes, like mining, or perhaps taking out convenience stores that don't sell his favorite cereals). Olivia asks about the component parts, but Walter hasn't had any luck tracing them.
Olivia's phone rings, and she says she's on her way. She hangs up and tells Walter and Ella that there was a security breach on the wormhole in Central Park, and Moreau was spotted. A security breach? Two guys walking along an unguarded path, from what we saw.
Peter's at Reiden Lake, where the trees are as colourful as a bowl of Froot Loops, despite the fact this is May and not the fall. That's OK, though. He's cautiously approaching the front door of what appears to be an empty cabin, but his skulking is somewhat hampered by the ringing of his cellphone, which he should probably set at least to vibrate if he's attempting to go all ninja. He answers it, but there's no response, and the screen is flashing "Missed Call" at him and he doesn't bother to check to see who it was.
Using the key from the box found at the campsite, Peter unlocks the front door and opens it. Drawing his gun, he goes inside, and eventually finds himself pointing his gun at Walternate, sitting in the dining room. "Hello, Peter," says Walternate, emotionlessly.
Peter lowers his gun -- well, Walternate IS, technically, his father -- and sits in the chair opposite. They do not hug or shake hands, which, as it will turn out, would have been helpful. Peter asks why he left the key at the campsite, and Walternate says he knew Peter would have recognized and, after all, he couldn't just call Peter. Peter says he could have. "Not if we were to have the reunion we both so richly deserve," says Walternate.
At this point I'd like to mention the sweet Hudson's Bay wool blanket folded on the chair behind Walternate. Classic Canadiana. Anyway, after Walternate admits that letting Peter know Moreau worked for him was his way of getting Peter's attention -- among other things -- Peter says he should have known that since Walter was the only one brilliant enough to figure out how it worked that it stands to reason that Walternate were the only one brilliant enough to invent it. Or how about that Walternate has tried to destroy this universe before? Did that enter into the thinking? Peter calls them Yin and Yang, which Walternate calls interesting, and then goes into a diatribe about how one man broke the universe and the other man did nothing but have his son stolen, his life stolen, ruined. "I came over here at the end on a mission of mercy to ask for help for my side. The race was lost, a race I didn't initiate. But still, I came. And you destroyed us, Peter ... my son," he says, spitting out "my son" with bile. He continues in that vein but Peter interrupts Walternate to remind him that he activated the machine on his side. "You were going to use it to destroy this universe. I only acted in self-defence," he says.