Shark Week: Season 2026, Episode 20

2026 - 20: Thresher Shark: Stun to Kill

The physics behind the thresher shark's devastating tail strike has long remained a mystery…until now. For the first time ever, the discovery of a shallow-water feeding ground has made observing this behavior possible. Now, shark scientist Dr. Craig O'Connell and marine biologist Aliah Banchik dive into the direct line of fire as they attempt to reveal exactly how these predators use their tails to stun and kill.