When did Horizon Season 8 Episode 5 air?
Horizon Season 8 Episode 5 aired on February 15, 1971.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
The first of a two-programme investigation in which Horizon and Man Alive have combined forces. This episode investigates the facts about drug abuse and experimental work undertaken in this area.
Direct answers for episode-level questions and details.
Horizon Season 8 Episode 5 aired on February 15, 1971.
This episode runs for approximately 60 minutes.
Comments coming soon
Discuss episodes with other viewers