“6B” is episode fourteen of season three of Fringe.
In Park Slope, Brooklyn, a couple arrive at an apartment building where they’re going to a party. They head to the lift and see a woman struggling down the stairs with luggage. She says the lift is working and wishes them luck as they enter. The woman heads out of the hotel and talks to the doorman. She’s going to stay at a hotel and isn’t the first to leave. The doorman says he will call a cab.
The couple arrive at the apartment, and the woman is talking to her friends who own the apartment. The blender starts by itself and apparently the stove did yesterday. The woman starts to eat, then starts having an allergic reaction. Her boyfriend is called for her purse. Downstairs, the woman who was leaving is getting into a cab when a man falls to the ground. Followed by several more people and some furniture.
Walter is cooking pancakes. He doesn’t like how no cases has translated into not seeing Olivia. Peter says that whatever is happening isn’t Walter’s concern. Walter thinks Peter’s happiness is his concern. Peter doesn’t want him to force it. Then Olivia arrives; Walter had got her to come over. He leaves her with Peter and Peter explains that Walter wants them to spend time together. Just the two of them.
Olivia starts to leave, but Peter says that whilst he may not approve of Walter’s methods, as she’s here they can talk about what’s bothering her. Which is that she knows Peter had feelings for Fauxlivia and thinks he still does, and that he isn’t being entirely honest. Peter admits that, but he’d thought of the two of them being together and now he’s seen it, it was beautiful. Olivia says her alternate took that from her. Peter thinks Olivia is the one stopping it now. Then she gets a call from Broyles.
In Brooklyn, Broyles explains that six people at a party on the seventh floor fell to their deaths from the balcony. Suicide is considered, but Peter says people don’t normally take patio furniture with them. First responders didn’t detect structural damage. Olivia heads to speak to the doorman, who says that maybe it’s true what they say about the place. An elderly woman is watching them from one of the apartments.
The apartment owners talk to Broyles about what happened. Walter joins Peter on the balcony; Peter is looking down and says he doesn’t think the people jumped. Walter looks and agrees. They should have landed further away. But they landed as if they fell straight through the balcony. How does someone fall through a solid floor? Olivia joins them and suggests ghosts. The residents think the building’s haunted. She describes things that have happened; half the residents have left. Walter is flipping a coin. He says he knows what’s happening. He flipped a coin ten times and get ten heads. The laws of physics have been disrupted. Like the other universe, there’s is coming apart at the scenes and it’s starting here.
At the lab, Walter says this is a hole that could eventually lead to a vortex. He agrees they need more proof and sends Olivia and Peter back with instruments. After they go, Astrid speaks to Walter. He wants the case file and notes on the bus attack in “The Ghost Network”. Walter is clearly concerned about a vortex and isn’t being himself even by his standards.
Pete4r and Olivia set up the instruments. Walter wants them to wait on site so Peter suggests they wait in a bar. The elderly woman, greeted as Mrs Merchant, passes them and heads to her apartment. In the bar, Peter and Olivia talk. She wants to know what it’s like to be with him, and kisses him. Then heads outside. Peter follows and she explains he glimmered. She’s afraid he’s right and she’s the one stopping us because she’s incapable of being wonderful and terrified she can’t fix this. That it’s who she is. She looks at the building and sees a glimmer coming from an apartment.
Mrs Merchant is looking at a photo album and Walter is getting readings. Peter and Olivia arrive at the apartment and she sees a glimmer from the door. They break in and Olivia can see a ghostly figure of a man, who then disappears.
Ghosts are something Walter doesn’t believe in. And things that Olivia sees glimmer are from the other side. He thinks what she saw was the other side breaking through. If Walter is right, and he’s panicking about this, a hole is developing, and it will need plugging if it does. And that’s not good.