As Walt deals with the aftermath of the Casa Tranquila explosion, Hank works to wrap up his investigation of Gus' empire.

Walt and Jesse pursue an unlikely business partner. The DEA filters through various leads in hopes of finding something.

Walt and Jesse formulate a new business plan. Walt shares a secret with Marie.

Walt celebrates another birthday. Skyler contemplates her options, and an associate puts a crimp in Walt and Jesse's business strategy.

Walt's team gets creative to obtain the methylamine they need to continue their operation.

Walt, Jesse, and Mike struggle over the future of their business, as occupational hazards weigh on Jesse.

Walt takes control of business matters; Mike deals with the consequences of his actions.

Walt takes care of loose ends; Walt makes a dangerous decision.

As Walt and Jesse adjust to life out of the business, Hank grapples with a troubling lead.

While Skyler's past catches up with her, Walt covers his tracks. Jesse continues to struggle with his guilt.

Jesse decides to make a change, while Walt and Skyler try to deal with an unexpected demand.

An unusual strategy starts to bear fruit, while plans are set in motion that could change everything.

Things heat up for Walt in unexpected ways.

Everyone copes with radically changed circumstances.

All bad things must come to an end.