Explosive new evidence that overturns conventional theories about exposure to radiation. Following the nuclear disasters at Hiroshima and Chernobyl, it was assumed that such horrors could trigger cancerous diseases, but scientists reveal a changing attitude toward the phenomenon.

Episode Viewers and Ratings

Season 42 Episode 5 of Horizon resulted in a 0.00 rating in the 18-49 demographic.

Horizon Season 42 Episodes...

• s42e01 - The Woman Who Thinks Like a Cow
• s42e02 - The Genius Sperm Bank
• s42e03 - Bye Bye Planet Pluto
• s42e04 - We Love Cigarettes
• s42e05 - Nuclear Nightmares
• s42e06 - Tutankhamun's Fireball
• s42e07 - The Life and Times of El Nino

Horizon Show Summary

Horizon is BBC Two's flagship 50-minute science documentary series.

Recognised as the world leader in its field, it regularly wins a sweep of international science, medical and environmental film accolades, and has recently won the Royal Television Society Award and the Prix Italia.

In 2002, the British Academy of Film & Television Arts presented Horizon with the BAFTA Television Award for Best Factual Series or Strand.

In 2003 it won the prestigious Images et Science award for best medical documentary and the Carl von Linne Award at the Living Europe film festival in Sweden. That year, a Horizon co-production with WGBH Boston won the Emmy for best documentary.

In September 2014 it celebrated its 50th anniversary and it continues to enjoy outstanding critical acclaim.