Professor Jim Al-Khalili investigates the important concepts of energy and information.
Order and Disorder is part of the BBC Four Big Science Season. Discover the other programmes in the season below…
Seven Ages of Starlight: A "stunning journey" through the life and times of stars.
The Final Frontier? A Horizon Guide to the Universe: An in-depth look at science's quest to understand the mysteries of the universe.
Tails You Win: The Science of Chance: Professor David Spiegelhalter tries to pin down what chance is, revealing how it works in the real world.
Voyager: To the Final Frontier: A look at NASA's Voyager programme as the two spacecraft leave the Solar System.