This Radiolab episode recounts how a Radiolab podcast about hands-only CPR unexpectedly saved a listener's wife's life. The episode begins with a producer sharing the listener's story, highlighting the immediate action taken based on the podcast's instructions. It then transitions to a discussion about the "chain of survival" in cardiac arrest and the importance of immediate CPR. The episode concludes with expressions of gratitude from the listener and a call to support Radiolab. The listener's experience demonstrates the real-world impact of readily available information and the power of immediate action in life-threatening situations.