This is the only time in the entire series where most of the show's full theme song is played. It is not played through from beginning to end however.
Parts of the final phone call between Walt and Walt Jr. had to be filmed a second time because the original production footage was partially destroyed during shipping as the film canister fell out of the containing truck and was crushed by a 737. They wound up inter cutting between the original shooting and the re-shooting.
The drink that Walter White orders at the bar is called a Dimple Pinch. It's a rare, 15 year aged form of Scotch Whisky produced by one of Scotland's oldest surviving distilleries. Also, Mike's favorite drink.
On the night that this episode aired (September 22, 2013), the series won the Emmy for Outstanding Drama Series for the first time.
The Extractor (Ed) runs a service providing people with new identities under the guise of a vacuum cleaner repair shop. This role was played by Robert Forster, who once worked as a vacuum cleaner salesman while struggling as an actor.