"Remove everything that has no relevance to the story. If you say in the first chapter that there is a rifle hanging on the wall, in the second or third chapter it absolutely must go off. If it’s not going to be fired, it shouldn’t be hanging there."
- The Bullet — Season Three, Episode 7 (“One Minute”) — Early in the episode, an arms dealer gives the Cousins a hollow-point bullet “on the house.” That bullet later falls out of one of the Cousin’s pocket and is used by Hank to kill both Cousins before they kill him.
- The Box Cutter — Season Four, Episode One (“The Box Cutter”): Seen in the first act, used later by Gus to slice open Victor’s throat.
- Lily of the Valley — Season Four, Episode 13 (“Face Off”): This one is my favorite because you probably wouldn’t catch it until the second time through. In the previous episode (“End Times”), Walt’s spinning gun pointed to a seemingly irrelevant potted plant. In the end of the finale, of course, it was revealed to be The Lily of the Valley, which was the plant that poisoned Brock.
- The Throw Rug — Season Four, Episode 11 (“Crawl Space”): Seen early on when Ted answers the door and nearly trips. Later, he trips over it and is nearly killed.
- The Ricin Cigarette — Season Four, Episode 9 (“Bug”): This was kind of a Chekhov’s Gun fake-out. Walt gives Jesse a cigarette poisoned with Ricin to use to kill Gus. In the penultimate episode of season four, Jesse believes that Ricin was responsible for Brock’s illness (It was not). The cigarette was removed by Saul’s body guard, Huell, and it is still in play. The cigarette was reintroduced by Saul in the fifth season premiere.