5-th episode of 37-th season "Horizon"

What "Horizon" 5-th episode about

Thirty years ago a small and rare tropical plant was put into these tanks to grow. What came out was a monster. Today it is a potential threat to seas and oceans across the world.

Episode number: 5

Episode name: "Killer Algae"

Episode release date: 8 february 2001 at 21:00

Status: aired