Walt, in deep thought, is observing a fly at Vamonos Pest when when Todd informs him that he has disposed of Mike's car. The two walk to Walt's car and open the trunk, where Mike's body is being kept. Walt lies to Todd and claims that Mike's death had to be done and the two prepare to dissolve his corpse in acid. The garage door suddenly opens, prompting Todd to close the trunk. Jesse enters, asking if Walt met with Mike, and if Mike got the money and got away. Walt evades the question, saying only that "Mike is gone." Jesse questions what should be done about Mike's men, suggesting a vote. Walt tells Jesse that now that he has quit, he no longer has a vote and that Walt will handle it himself. He quickly ushers Jesse out of the garage with a stern glare. The door descends between them.
In the city jail, Hank rejects a proposed plea deal from Dennis and his lawyer, and leaves to look for a better deal from another former associate of Gus. Meanwhile, at a coffee shop, Lydia defensively refuses to give Walt the names of Mike's men, and the now-incarcerated lawyer who paid their families. She reminds Walt that there's now a tenth name (Mike's lawyer) but states she has not written the names down, and will only divulge them after her safety is assured. She surmises Mike has been eliminated, which Walt confirms. Eager to be of further use to him, Lydia proposes a new business plan to sell Blue Sky in the Czech Republic -- where purity of meth is 60% compared to Walt's 99% -- using her trusted associates on various levels at Madrigal. After negotiating a 30% commission of their joint business, Lydia gives Walt the names. After she leaves Walt lifts his hat off the table disclosing hidden beneath that he had brought the ricin capsule to the meeting (implying that he had intended to kill Lydia to tie up another loose end) but decided not to use it after accepting Lydia's new offer.
Walt meets with Todd's uncle Jack and his associates. They debate the logistics of killing ten inmates in two minutes at three different prisons. The next day, Walt paces around his dining room watching the seconds pass on his new watch. In the prisons, Mike's lawyer Wachsberger and the nine "legacy" members of Gus' Drug Empire are shanked, strangled, or burned alive. Hank is pulled from a photo-shoot with a group of schoolgirls by Gomez and given the news. Three days later, Hank and Walt share a drink at Hank's house and Hank reminisces about his first job as a tree tagger. He wonders if that job was better than his current job Hank describes as "chasing monsters."
Walt and Todd resume cooking meth and deliver shipments to Declan's driver and to Lydia who ships it to the Czech Republic. They perform several cooks in various houses undergoing pest control treatments over a period of three months, while Skyler White continues to launder the drug proceeds and Saul Goodman watches the wires. During a visit to her children at the Schrader residence, Skyler watches as Holly White takes her first assisted steps and Marie makes a comment to Skyler that she and Hank feel they might be "enabling" her family. She suggests to Skyler that it might be time for her and Walt to reunite with the children at their own home, to continue to heal as a family. Later that night, Skyler takes Walt to a storage unit she has rented, shows him a gigantic pile of cash that she has created out of his drug proceeds, having been unable to launder or count it all, and pleads to have her children back home and her life back as she shows him all that he has accomplished.
Walt goes to the hospital for his routine MRI. After his scan he visits the bathroom where he washes his hands and notices, with a smile, the paper towel dispenser he punched in "4 Days Out." Then he drops by Jesse's home after not being able to reach him by phone. In a tense interchange in which Jesse is distrustful of Walt's intentions, they manage to reminisce about their old RV which Jesse had coined "The Crystal Ship." After a short bout down memory lane, where both almost relax into their old selves, Walt turns to leave. At the door he turns back and tells Jesse, "I left something for you." Jesse hesitantly edges toward two large duffel bags on his porch and to his relief finds that they are full of cash, his owed $5 million's worth. He hauls his haul inside, sits down on the floor and stares at it, his eyes filling with tears of relief, joy and gratitude as he takes his pistol out of his pants, switches the safety back on, then shoves it away from him along the floor.
Walt returns home and announces to Skyler, "ok, I'm out." Skyler realizes she can have her children back in their home. By the weekend, the White family and the Schraders happily gather around the table beside the pool. Holly is being pushed on her red plastic toy by her brother Walter Jr. as Hank and Walt talk about Hank's Schraderbräu beer. Skyler, seemingly more relaxed, idly chats with Marie about hair styles.
Hank excuses himself to use the bathroom. Sitting down on the toilet in the White's master bathroom, Hank looks around for something to read. After thumbing through a magazine, Hank loses interest and finds a copy of Walt Whitman's Leaves of Grass. As Hank thumbs to the front of the book, he comes to an inscription in a familiar handwriting: "To my other favorite W.W. It's an honour working with you. Fondly, G.B." In an immediate flashback, Hank recalls his discussion of a case with Walt that concerned lab notes by Gale Boetticher (""), where Hank joked Walt could be 'W.W.' and Walt offered up the 'Walt Whitman' decipher -- and Hank finally comes to the uneasy realization that Walter White is the elusive meth kingpin and mastermind "Heisenberg" that he has been searching for all along.
- The prison killings are inspired by the climactic scene of "The Godfather", in which the film's protagonist is made godfather to a child, whilst a string of brutal murders is carried out on his orders.
- The name of the episode is also the name of one of Walt Whitman's poems: "GLIDING O'ER ALL, through all, Through Nature, Time, and Space, As a ship on the waters advancing, The voyage of the soul--not life alone, Death, many deaths I'll sing."
- The entire cast appears in this episode. Jonathan Banks (Mike Ehrmantraut) appears briefly as a corpse in Walt's trunk and Bob Odenkirk (Saul Goodman) appears in his office, without any speaking lines.
- This is the second episode to feature a large time jump. The second season finale "ABQ" features a several week jump as Walt heals from his surgery, this one approx. three months.
- The scene in the beginning where Walt is implied to have planned to poison Lydia Rodarte-Quayle with ricin at The Grove could be considered foreshadowing for "" where he fatally poisons Lydia in a similar situation.
- Continuity error: Todd Alquist's uncle refers to the 10 prison murders as being more difficult than the raid that killed Osama bin Laden. However, bin Laden was killed on May 2, 2011, and the episode presumably takes place in 2010. Vince Gilligan admitted this was a mistake. However, it's possible to explain this away by arguing that Jack is one of the many conspiracy theorists that believes Bin Laden was taken out before then.
- When Walt opens the trunk with Mike's corpse, his car doesn't have a license plate.
- The lyrics of "Crystal Blue Persuasion" are used here as an obvious reference to the blue-tinged methamphetamine produced during that montage scene, but songwriter Tommy James has stated that the "crystal blue" refers to the crystal lake in the Book of Revelation and "persuasion" to James becoming a Christian. It was written in 1969.
- Gale Boetticher gave Walter White that copy of Whitman's Leaves of Grass in the episode "Sunset" (White was shown reading that book when he received a call from Hank). The book was also shown in the episode "Hazard Pay" when Walt was unpacking his belongings (he grins when he sees the book).
- The inscribed copy of Whitman's Leaves of Grass used in the show sold at auction for $65,500 on October 8th 2013.
- Walt owns David Reynolds’s 150th anniversary edition of the 1855 Leaves of Grass which, strangely enough, does not include Gale's favorite Whitman poem, "When I Heard the Learn'd Astronomer".
- This episode features several 'easter egg' reference to previous episodes in the series, including:
- Walt seeing the fly on the table.
- The painting Walt claimed to have seen before. (Last seen in Season 2, episode 3.)
- The damaged paper towel dispenser in the restroom of Walt's cancer clinic in Season 2
- Lydia mentions the line, "We're gonna make a lot of money together." The same exact line Tuco said in Season 1. Walt seems to remember this and reacts with a hesitant expression.
- Walt tells Lydia, "Lydia, learn to take yes for an answer," which is exactly the same advice Mike gave him in the bar ("").
- Walt asks Jesse, "Who's we?" which is the question Jane asked Jesse after pretending not to know him when her dad visits ("Over").
- Jack describes the plan to kill the inmates with the expression, "Boom, boom, boom," which is how Jesse and Walt described the plan to kill Tuco ("Seven Thirty-Seven").
- Skyler asks Walt to, "Take a drive with me," to go see the cash, just as Gus asked Walt to go see the superlab ("Más").
- Towards the end of the episode, when Walt and co. are sitting on his patio, before it shows them talking and Jr. strolling Holly, it features the same exact filming pattern as seen in several episodes of Season 2 due to the flash-forward with the Pink Teddy Bear.
- Flynn gets called by Louis when he's around Skyler and Marie, which is a reference to the call he got in "...and the Bag's in the River".
- Flynn does a peek-a-boo to Holly, referencing to Jesse doing the peek-a-boo to the kid in "Peekaboo".
- Michael E. Stogner as Prison Guard
- "Night in the City" by Paul Abler (as Walt & Lydia meet in the café)
- "Clear Skies" by Paul Abler (as Walt & Lydia meet in the café)
- "Spindrift" by Alexander McCabe (as Walt & Lydia meet in the café)
- "Pick Yourself Up" by Nat "King" Cole and George Shearing (during the prison murder montage)
- "Crystal Blue Persuasion" by Tommy James and the Shondells (during the meth production montage)
- "Up the Junction" by Squeeze (in the background while the Whites & the Schraders eat)
- Skyler: "Take a drive with me. Walt, this is it. This is what you’ve been working for. I rented this place, and I started bringing it here, because I didn’t know what else to do. I gave up counting it. I mean I had to. It was just so much, so fast. I–I tried weighing it. I figured one bill of any denomination weighs a gram. There are 454 grams to a pound, but there’s a variety of denominations, so..."
- Walter: "How much is this?"
- Skyler: "I have no earthly idea. I truly don’t. I just stack it up, keep it dry, spray it for silverfish. There is more money here than we could spend in ten lifetimes. I certainly can’t launder it, not with a hundred car washes. Walt, I want my kids back. I want my life back. Please tell me–How much is enough? How big does this pile have to be?"
- ―Sklyer and Walt facing a mountain of banknotes at the storage facility.