548. Why Is the U.S. So Good at Killing Pedestrians?

549. The First Great American Industry

550. Why Do People Still Hunt Whales?

551. What Can Whales Teach Us About Clean Energy, Workplace Harmony, and Living the Good Life?

552. Freakonomics Radio Presents: The Economics of Everyday Things

Extra: A Modern Whaler Speaks Up

Should Traffic Lights Be Abolished? (Ep. 454 Replay)

553. The Suddenly Diplomatic Rahm Emanuel

554. Can A.I. Take a Joke?

555. New Technologies Always Scare Us. Is A.I. Any Different?