The final scene between Jimmy and Chuck in the Better Call Saul finale is a great moment that was actually set up in the pilot episode of the show. The relationship between Jimmy and Chuck had always been deeply fractured. This was in evidence throughout the show up to and after Chuck's death. When Jimmy was with Chuck, he was Jimmy, the younger, no-good brother. In the court scene, where Chuck was unmasked, however, it was by Saul Goodman. The first time Chuck was introduced and the last view of Chuck in Better Call Saul bookend the toxic relationship of the brothers.
Jimmy and Chuck McGill couldn't be more different. "Slippin' Jimmy" had a drive to do morally questionable things, and he wasn't afraid of bending the law to suit his purposes. Chuck, however, took great pains to stay true to his high standards and would often speak to Jimmy from a position of pompous moral superiority. This emotionally affected Jimmy as he didn't want to disappoint Chuck, particularly as Jimmy tried his best to please his older brother. Chuck's condescension and his thinly veiled resentment led him to sabotage Jimmy's efforts to become a lawyer. Chuck and Jimmy's relationship was complex, and this was revealed in every scene they had together in Better Call Saul.
This relationship was set up from the start. The Jimmy and Chuck scene in the Better Call Saul pilot episode seemingly took place shortly after the flashback finale scene. In the flashback finale scene, Jimmy tells Chuck that the newsstand on Central might start carrying the Financial Times, while the pilot occurred a day or two later, with Chuck exclaiming, "Oh! Financial Times!" Both scenes had Chuck urging Jimmy to reimburse himself for the expense of delivering groceries every day, but Jimmy refused. In the pilot, Jimmy tried to convince Chuck to cash out of Hamlin, Hamlin & McGill, but Chuck revealed that he had been visited by Howard Hamlin and that Howard wanted Jimmy to change his name so as not to be associated with Hamlin, Hamlin & McGill. Chuck was eager to distance himself from his brother's shady practices, and said that HHM would surely cover the expense of new matchbooks, a backhand comment about Jimmy's target market. Jimmy found this insulting and hurtful coming from his brother.
What Jimmy & Chuck's Final Scene In Better Call Saul Means
The Better Call Saul Jimmy and Chuck flashback in the finale shows Jimmy arriving at his brother's house with groceries, as in the pilot. Chuck asks why he continues to stop by every day when Chuck can easily get someone from the firm to do it. Jimmy tells him, "You're my brother. You'd do the same for me." The flashback is tinged with sadness as, by this point, it's quite clear that Chuck would never have done the same for his brother. It's clear he needs Jimmy, but his pride will never let him it that. Chuck wants Jimmy to stay and talk, but Jimmy assumes Chuck just wants to tell him what he's doing wrong. Chuck ends the exchange and says, "We always end up having the same conversation, don't we?"
The juxtaposition of these two Chuck and Jimmy Better Call Saul scenes bookending the series underscores the way Chuck's desire to take Jimmy's name away and his lack of faith in his brother pushed Jimmy into becoming Saul Goodman. At the end of the finale flashback scene, Jimmy leaves Chuck a copy of H.G. Wells' The Time Machine, a reference that had appeared elsewhere in the show. Jimmy's gift subtly highlights how the brothers themselves had greatly changed between the pilot and the finale, even though only a few days had ed chronologically, while their relationship in Better Call Saul remained ever the same. The viewer knew how it ended for them, like a time machine taking them forward and then back to the beginning of the series.