Casting includes incidental diversity organic to its international setting: David Harewood (black British actor) as CIA officer Joel Steinn, Adeel Akhtar (British-Pakistani) as arms broker Abu Ramadi, and Spanish actor Antonio de la Torre in a supporting role, reflecting a post-OscarsSoWhite 'boom' in opportunities Harewood noted, but no evidence of race-swapping complaints or clashes with source material. A notable change is gender-swapping Leonard Burr to Olivia Colman, who delivers a standout pregnant performance adding thematic layers to intelligence work without feminist messaging.

Creators like writer David Farr and director Susanne Bier discussed industry sexism broadly but emphasized storytelling fidelity, with le Carré approving alterations like a modern timeline and altered ending. Reception was overwhelmingly positive—Emmy wins, critical acclaim—with zero 'woke' backlash or 'go woke go broke' narratives; recent viewer sentiments position it as a non-woke contrast to newer content. Progressive elements are minor, background, and non-dominant.