Barney gets emotional when he opens up to Honey about his life. Ted admits to having feelings for Zoey to the group.

When a scientist falls dead after ingesting a lethal cloud of blue powder and his bones disintegrate in his body, the CDC suspects a biological attack. As the Fringe Team investigates further, a subject from Walter’s past with ties to Olivia reluctantly agrees to assist with the intense case.

When Patrick Jane and others are taken hostage by an armed man accused of murder, Jane must think quickly to defuse the situation.

Abed invites « Fat Neil » to play a game of Dungeons & Dragons with the rest of the study group, hoping to boost his confidence, after Jeff becomes concerned about him being a loner. When Pierce finds out he was not invited, he joins anyway, disrupting their plans.

When Alicia’s client confesses under duress to murdering a fellow prison inmate, Cary’s team seeks to challenge by uncovering an unlikely connection between the two inmates. Wendy threatens to expose a Florrick family issue in hopes of forcing Peter to drop out of the race.

When the son of an American diplomat is detained in Burma for a crime he didn’t commit, Peter and Neal delve into the exotic but dangerous world of jewelry smuggling to prove his innocence.

After the radical faction of the Fifth Column murders three Peace Ambassadors, Erica goes on a mission to hunt down their leader, Eli Cohn, a former Mossad agent. Meanwhile, as Jack and other priests around the globe begin to speak out against the Visitors, Anna heads to the Vatican in an effort to convince the leaders of organized religion that the Visitors truly are « of peace. »

Series finale
Cal takes a wicked pleasure in wiping the arrogant smirk off the face of a computer entrepreneur who Cal believes murdered one of his partners and framed his other partner in order to gain full ownership of a successful social networking site the three created together.

When the Fringe Team visits Massive Dynamic’s assembly of the doomsday device, Walter becomes greatly concerned for Peter’s well-being, so he turns to Nina for added brain power to understand the relationship between Peter and the superweapon. Meanwhile, the discovery of a dead body triggers an intense investigation.

With the mastermind behind Kate’s death uncovered, Peter and Neal explore their pasts to gain answers.