The team follow preparations for the second Grand Challenge, a robotic car race across 130 miles of the Nevada desert with a prize fund of $2million. A story of crashes, set-backs and dashed expectations emerges as the designers attempt to build vehicles that can drive themselves at speeds of up to 50mph.

Episode Viewers and Ratings

Season 43 Episode 5 of Horizon resulted in a 0.00 rating in the 18-49 demographic.

Horizon Season 43 Episodes...

• s43e01 - Survivors Guide to Plane Crashes
• s43e02 - Chimps are People too
• s43e03 - The World's first Face Transplant
• s43e04 - Human v2.0
• s43e05 - The Great Robot Race
• s43e06 - Pandemic
• s43e07 - We Are the Aliens
• s43e08 - Doctors in the Death Zone Part 1
• s43e09 - Doctors in the Death Zone Part 2

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.