Introducing: Day X

What starts with a mysterious gun in an airport bathroom and a fake refugee identity opens the door to a nationwide network of far-right extremists inside Germany’s military and police. It’s a story about a changing national identity — and the backlash against it — raising a question that democracies across the world are waking up to: What happens when the threat is coming from within?See all episodes of Day X at nytimes.com/dayx Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.