Skyler gets more involved in Walt’s business, much to his chagrin. Hank struggles with his recovery. Jesse takes an active role in his new enterprise, leading him to a startling discovery.

Heads of state gather at the UN to sign the accord, three at CTU make a final effort to expose a conspiracy, Logan and Pillar tie up loose ends, and justice may elude Jack.

The Russian Federation President arrives to sign the accord, Jack wants justice, and Logan stays in pursuit. Meanwhile, Dalia has a realization, President Taylor rattles her sabers, and Chloe tests her mettle.

Walt becomes obsessed with a contaminant in the lab and refuses to finish the cook until it is eliminated. A frustrated Jesse attempts to get Walt back on track.

Britta and professor Slater fight for Jeff’s affection; Troy is upset when Abed doesn’t ask him to move into his dorm room.

Claire makes an effort to take a new family portrait, but everybody is too busy to cooperate: Gloria and Manny go with Phil and Alex to a Lakers game and share an awkward moment on the jumbotron, Cameron gets a job as a wedding singer while Mitchell takes care of Lilly and a stray pigeon, and Luke interviews Jay for a school project.

Parent-Teacher conferences cause Frankie to worry about the kids. In them she’s told Axl is gifted but not applying himself, that her teachers still do not know who Sue is, and Brick may have to repeat the second-grade due to failure to return over 30 library books. Guest star Betty White as the school librarian.

As Hank’s hospital bills stack up, Skyler hatches a plan. Walt and Gus come to a better understanding. Jesse, looking for more independence, pursues a new opportunity.

Romantic sparks begin to fly when Patrick Jane and supposed psychic Kristina Frye cross paths again during the CBI investigation into the murder of a charismatic head of a non-profit organization that fights human trafficking.

In part one of the two-part, two-night second season finale, Walter and Olivia travel to the parallel universe, and the anticipated face-off between Walter Bishop and William Bell occurs.