After the commercial break, we're not at the Bishops' place, and Walter's looking at the drawing, which Olivia has brought with her. "Oh my. I think this is what I'm supposed to remember," he says. You forgot that? Your son's eyes exploding? I know your memory is bad, but damn. Olivia says she thinks it was left for her by one of the Observers, and Walter says when he brought Peter from the other side, one came to visit him some years later. "He told me that I had to agree to never let Peter return to the other side." Olivia asks why, and Walter's all, "Duh! This!" and points to the drawing, but Olivia doesn't really know what this is, and Walter says it's exactly what it appears to be: "I think my son... is going to be responsible for the end of the world." Oh, sure. Everyone thinks his kid is just so special. "My kid got into Harvard." "My kid's responsible for the coming apocalypse." Walter can post all about this on Facebook and risk having his friends hide him on their newsfeeds.
Olivia figures it's probably a good idea to bring Peter back, instead of having him responsible for destroying the world, and Walter points out that Peter went over by his own free will, which I hate to tell Walter does not trump "destroy the universe" in this argument. Besides, as Olivia points out, Peter didn't know his eyes were going to explode. She wants to at least try to get him back but Walter whines that there's no way of even contacting him, and a frustrated Olivia slams her hands down and is all, "Walter! How?"