"I think the reason why they (fans) relate to the characters of Fallout is because they're the ones that got left behind.
"They have to make sense of the tragedy that was Armageddon."
Lead actress Ella Purnell plays Lucy MacLean in the show, a vault dweller raised underground in a protective bunker.
For her, the series' success is down to its tone, balancing "the comedy, with the drama, and the heart".
"I think it's the visual aesthetic and also the music," she says.
"I think it's the, sort of, retro-futuristic, they've somehow made the apocalypse really entertaining."
The series weaves together the stories of three characters, including Lucy, striving to survive in a world ravaged by nuclear bombs.
"One of the wonderful things about the show is that I trust every single person on this show so incredibly much," she says.
"The writers, the creators, love the game. They all love the game. My job is to make Lucy as truthful as I possibly can, and their job is to make sure that we do service to the game.
"With that combined, it's just this beautiful collaboration."
