The slow loris is the real-life gremlin, extremely cute but possessing a deadly venom unusual in a primate. It's also a YouTube superstar with millions of hits. Dr Anna Nekaris travels to the jungles of Java to solve the riddle of its lethal capabilities, but a shocking discovery awaits. At 9.00pm we have the latest instalment of the very compelling Crusades. Dr Thomas Asbridge uses fresh research and contemporary accounts to explore the personalities of Richard the Lionheart and his adversary Saladin, who led the Christian and Muslim forces respectively during the Third Crusade in the 12th century. He examines how both men were capable of dark deeds - as well as acts of military genius - and why the Crusaders' hopes of recapturing Jerusalem were dashed.