It was written by J. Roberts and directed by cast member Bryan Cranston who portrays central character Walter White.
After Tuco departs, Walt calculates the minimum amount of money he will need to provide for his family, concluding that the figure is $737,000.
Meanwhile, Jesse meets with an illegal arms dealer at a hot dog restaurant and purchases a Ruger SP101 handgun.
At the DEA field office, Hank's partner Steven Gomez shows him footage of two individuals stealing methylamine.
[a] Hank dismisses their ability as thieves, but is intrigued by the fact that the unknown pair stole methylamine and used thermite to enter the warehouse.
Gomez speculates they may be college-aged chemistry students, and Hank believes the two will encounter difficulty from the drug cartels for disrupting the meth trade.
Jesse encourages Walt to also purchase a gun, hoping to "double their chances" of success in the event of a shooting.
[b] Walt and Jesse produce the ricin, hoping to trick Tuco into poisoning himself by placing it in the next meth delivery.
It is revealed that the crime scene Hank is investigating is the junkyard and that Gonzo has accidentally died in a botched attempt to move No-Doze's body.