Watch on SFlix. Naive tourist Twoflower (Sean Astin) and inept wizard Rincewind (Sir David Jason), join forces with venerable hero Cohen (David Bradley) and rescued sacrificial virgin Bethan (Laura Haddok). Pursued by wizards and mercenaries sent by the Unseen University's murderous new Archchancellor, the four make their way to Ankh Morpork. Meanwhile, an ominous red star grows larger. Based on Sir Terry Pratchett's second Discworld book, "The Light Fantastic". —Francine Carrel