"The Walking Dead" is a long-running American TV series that depicts a world ravaged by a zombie apocalypse. The article highlights how radiation is showcased in the show by examining the origin of the zombie outbreak. In "The Walking Dead," the cause of the apocalypse is a virus that is believed to have been triggered by a combination of radiation and a previous pandemic. Throughout the series, radiation is portrayed as an invisible threat that continues to haunt survivors, as exposure to radiation can lead to severe illness or even death. This element adds an additional layer of danger to the already perilous existence in a zombie-infested world.

Similarly, "The 100" is a science fiction drama series set in a future where a nuclear apocalypse has occurred, rendering Earth's surface uninhabitable due to high levels of radiation. The article explains that the survivors of the apocalypse were forced to seek refuge in orbiting space stations until they ran out of resources.

Both series effectively utilize radiation as a key aspect of their narratives, showcasing its devastating consequences and the challenges it presents to the characters. The danger posed by radiation further intensifies the narratives by adding a constant underlying tension and emphasizing the desperate nature of survival in their respective post-apocalyptic worlds.