A snake wrangler, George "Dusty" Webb, was hired to secure the area and make sure none of the crew or cast were in danger of venomous snakes. Christopher Lim, a spider wrangler, was also picked for the final scene.
The railway pass where they hide the empty methylamine barrels for the heist appeared also in the 2008 movie Appaloosa (2008), when the train is stopped and the main characters aim at Renée Zellweger's captors.
When Hank asks Walt if Skyler is going to therapy, he answers that she's going with a man named Peter, though he couldn't remember his last name. At the same time, on the credits, the name of Peter Gould, co-executive producer, appears.
The locomotive seen in this episode is a GP7u manufactured by General Motors EMD division. It was owned and operated by the Sante Fe Southern Railroad in New Mexico.
Mike's line about "everyone sounds like Meryl Streep with a gun to their head" could be seen as a reference to End Times (2011), in which Walter convinces Jesse that Gus poisoned Brock while Jesse puts a gun to his head.