Yes, Black Mirror contains hidden Easter eggs and references that add an extra layer of enjoyment for attentive viewers. These Easter eggs are often subtle nods to other episodes or elements within the Black Mirror universe. Here are a few examples:
"White Bear" (Season 2, Episode 2): In this episode, the White Bear logo can be seen on a van and on TV screens, hinting at the theme park that appears in the later episode "White Christmas" (Season 2, Episode 4).
"Hated in the Nation" (Season 3, Episode 6): The news ticker at the bottom of the screen shows references to past episodes, such as "Prime Minister Denies Pig Allegations" from "The National Anthem" (Season 1, Episode 1).
"USS Callister" (Season 4, Episode 1): The game company TCKR appears in the background of this episode, referencing the company that created the San Junipero simulation in the episode "San Junipero" (Season 3, Episode 4).
"Black Museum" (Season 4, Episode 6): The museum showcases several artifacts from past episodes, including the digital consciousness device from "White Christmas" (Season 2, Episode 4) and the mask from "White Bear" (Season 2, Episode 2).