Breaking Bad

The two Mexican men are assumed to be relatives of Tuco, but it's not explicitly stated. One additional clue seen in this episode were the boots one of the relative's wears. They are the same skull-and-bones boots as Tuco wore.

As stated in an interview, Bryan Cranston usually includes a clause in his contracts that has him direct episodes. He has previously directed episodes for Malcom in the Middle and the episode "Seven Thirty-Seven" from Season 2 of Breaking Bad.

Goof: When Walt is playing with the pink teddy bear's eye he drops it and it rolls under the bed. Walt reaches down under the bed to get it and the camera shot looks back towards Walt from under the bed behind the eye as Walt is reaching in, and shows the pupil and iris of the eye facing to Walt's right (the viewer's left). Walt is interrupted by Skyler knocking on the door, and the camera follows Walt (this time from behind him looking back under the bed), and as he pulls his hand away the pupil and iris of the eye have now turned to face him. As he gets up to answer the door the pupil and iris have turned back to how they were first seen.

The painting on Jane's wall has a pink teddy bear falling in the sky, just like the one that falls into Walt's pool.

This episode was nominated for a 2009 Primetime Emmy Award for Outstanding Cinematography For A One Hour Series.

The four episodes in the second season that opened with a black-and-white flashforward actually spell out the ultimate scene of this final episode with their titles. Together they read: Seven Thirty-Seven Down Over ABQ.

Bryan Cranston mentions in an interview that the scene with Jane at the end of the episode was one of several versions. The original version was that Walter is filled with disgust when he sees Jesse and Jane on the bed. In a paternal way – like a 'this is somebody's child' way - Walter pushes Jane on her back. The version shown was in the middle of the original and Bryan's suggested third version. Bryan's suggestion was that he tries to wake up Jesse, Jane flops on her back and in disgust Walter walks out and when he's down the hallway he can hear her choking, but it doesn't really register. When he gets to the front door he realizes what he's actually hearing and runs back to the room and she's dead.

In "ABQ", Donald explains that Jane was born in Phoenix, a connection to this episode's title.

Bob Odenkirk and Bryan Cranston have both guest-starred on How I Met Your Mother. Both of them appeared as bosses to one of the main cast members.

At the beginning of this episode, Badger waits for a buyer on a bench. That bench features Saul and the "Better Call Saul" logo. Saul Goodman, Attorney at Law, (505) 164-CALL. Since there is no hint of what the future holds in this episode like many we have seen, this might be the only clue offered of what's to come.

The song that plays during the exchange and bust at the end of the episode is "El Picador" by Calexico. It's from their 2000 album "Hot Rail".

Negro Y Azul is Spanish for Black and Blue.

When Walter sneaks back into the hospital, they show him re-inserting his I.V. line on his own, showing the end of it as a needle he inserts. This is very unlikely as a real I.V. line does not retain any kind of needle after it has been inserted, the needle is actually pulled out and discarded, leaving only a flexible plastic line inside the vein.

The B&W movie Hector Salamanca is watching when they arrive at his house is Cantinflas' "El Mago" (1949)

At one point, Mark Margolis (Tio) starts using his bell to spell out SOS in morse code dings. This was suggested by Bryan Cranston.

Vince Gilligan admitted in an interview that Jesse was originally supposed to die around the end of season 1 (which technically includes the first two episodes of season 2).

Hank used the lowjack on Jesse's car to track down it's location in the desert. This is not said but strongly implied during the conversation with Jesse's mother with how much he spent on the car.

In this episode, Walter's second name is revealed to be Hartwell. This is actually a reference to executive producer Vince Gilligan's girlfriend, Lucy 'Holly' Hartwell Rice.

By the end of the season, we know what the title in this episode means. However, after the deal with Tuco at the beginning of this episode, Walt calculates how much he needs to make to keep his family afloat. He calculates that amount as "737" or $737,000.

The 2008 writer's strike prevented the next two episodes from being aired subsequently as part of the first season. They were already shot and edited, so the episodes simply became the first two episodes of Season 2.