Super Senses: The Secret Power of Animals BBC2, 9pm
New series. Biologist Patrick Aryee and physicist Helen Czerski explore the world of animal senses to reveal how they detect things beyond the limits of human perception, conducting experiments and demonstrations featuring a variety of species. They begin by investigating sight and reveal how caribou – wild reindeer of Alaska – use ultraviolet light to avoid their predators. They also discover how the dragonfly's ability to view things in slow motion allows it to make a kill, and show how a snake can see in the pitch dark without using its eyes.