Exterminate is the best-known catchphrase of the Daleks, the robotic enemies from the long-running British science-fiction series Doctor Who, while Torchwood is the show's adult-oriented spin-off set around a secret institute. The clipped, electronic delivery has made the word instantly recognisable far beyond the programmes themselves, and short clips of it have circulated widely as reaction sounds and meme audio. It remains popular because the single word carries threat, comedy and nostalgia at once, letting creators signal a villainous moment without needing any explanation.