"Sunk Costs" is a study in the weight of the past. As Kim Wexler stands by Jimmy, and Mike stands at the crossroads of a drug war, the episode argues that the "blind" spots in our own character are often our greatest liabilities. By the end of the hour, the characters aren't just paying for their mistakes; they are doubling down on the very traits that will lead to their eventual ruin.
The Better Call Saul episode "Double Blind" (Season 3, Episode 4—actually titled "Sunk Costs") serves as a pivotal crossroads for its two protagonists, Jimmy McGill and Mike Ehrmantraut. The episode masterfully explores the moral erosion of its characters, framed by the rigid structures of the legal system and the fluid ethics of the criminal underworld. The Legal Trap [S3E4] Double Blind
The episode’s true title, "Sunk Costs," refers to the economic fallacy of continuing an endeavor because of previously invested resources. Chuck is so invested in "taking down" Jimmy that he is willing to destroy his family. Jimmy is so invested in his identity as a lawyer that he accepts a deal that will eventually lead to his transformation into Saul Goodman. Conclusion "Sunk Costs" is a study in the weight of the past