Fringe

Achmed finds the doctor doing dishes in a restaurant.  Nobody wants to hire someone who helped the Americans.  He tells Peter and Olivia that Gillespie's unit was exposed to a synthetic neurotoxin.  They tried to develop a treatment but only four people survived: Gillespie, Burgess and two others.  Unfortunately, the treatment had a side effect.  Victims survived the exposure but turned into bio-shrapnel if they got too close to the wrong Radio Shack.  Lots of people knew about this but the doctor believes that Colonel Raymond Gordon would be the only one who would blow up his own soldiers.

Back in the States, Broyles briefs his teams.  They have the other two survivors in custody but the F.B.I. is looking for Diane Burgess and Colonel Gordon.  Burgess has been spotted at the Federal Center and they are prepared to jam the signal so she doesn't explode.  However they really want to catch Gordon so they will use her as bait.

Burgess gets the call telling her to look for the man in the black trench coat carrying the briefcase.  Really, in a downtown environment I would have expected more than one man to fit the description.  Anyway Peter and Olivia are on site, looking for Gordon.  Gillespie spots her contact and is off.  Meanwhile, in the surveillance van, Broyles and Walter realize that they are being jammed and cannot stop the radio-wave trigger from being broadcast.  Walter tells them that Burgess only has 30 seconds of exposure to the radio wave before she will completely crystallize and explode.

Burgess is stonewalled by the man holding the briefcase.  Gordon looks on from across the room.  He activates his handheld transmitter.  Peter tackles Gordon and they beat each other up.  Olivia destroys the transmitter by breaking it with her cane.  Burgess's arm starts to crystallize but it stops and she is saved.

Epilogues:

Peter covers up Gillespie's remains.  The incident with Burgess reminded him that Gillespie was a victim not a human jigsaw puzzle.  Walter shows Peter and advertisement for a place they can look at.

Olivia is back at the bowling alley.  Today's treatment involved measuring her hand for the perfect fit for a bowling ball.  She snaps.  She draws her sidearm and aims at Sam Weiss's head.  "I'm not here to play games.  Fix me."  He stares pointed at her, then at the cane she left across the room when she stormed over to him.  He got her to walk without her cane, and she didn't even notice.

Broyles listens to Gordon spout his manifesto of doing whatever it takes to defeat the enemy coming from the other side.  He's not crazy.  Not crazy!  Broyles wants to know what was in the briefcase.  Gordon doesn't know exactly; the briefcases contain information that the couriers pass to enemy observers.  As he speaks, we see The Observer receive a briefcase.  He opens it and extracts photos of Walter.  "What's in the briefcases will destroy us all."