Inside No. 9 consistently integrates LGBTQ+ characters into its diverse narratives, depicting them with dignity and complexity. Their relationships are presented as normal, not as sources of mockery or inherent misery. Episodes like "The Last Weekend" offer nuanced portrayals of gay relationships, contributing to an overall affirming impact where queer lives and love are treated with respect and empathy within the show's unique dark comedic and dramatic framework.

The series frequently depicts Christian institutions and adherents as hypocritical, superstitious, or complicit in cruelty, often using religious settings to expose the darker aspects of human nature. The narrative rarely offers a counterbalancing positive portrayal, instead highlighting how faith can be twisted or used to justify problematic behavior.