Ice is one of the strangest, most beguiling and mesmerising substances in the world. Full of contradictions, it is transparent yet it can glow with colour, it is powerful enough to shatter rock but it can melt in the blink of an eye. It takes many shapes, from the fleeting beauty of a snowflake to the multi-million tonne vastness of a glacier and the eeriness of the ice fountains of far-flung moons. Science writer Dr Gabrielle Walker has been obsessed with ice ever since she first set foot on Arctic sea ice. In this programme she searches out some of the secrets hidden deep within the ice crystal to try to discover how something so ephemeral has the power to sculpt landscapes, to preserve our past and inform our future.
Rosetta and new arrival Chloe band together to try to break the garden fairies' legendary losing streak in the Pixie Hollow Games, a sports spectacle filled with pixie pageantry, fantastic fairy events and hilarious surprises.
Recently-retired MI6 agent, George Smiley is doing his best to adjust to a life outside the secret service until a disgraced agent reappears with information concerning a mole at the heart of the service.
Hugo is an orphan boy living in the walls of a train station in 1930s Paris. He learned to fix clocks and other gadgets from his father and uncle which he puts to use keeping the train station clocks running.
The story is loosely based on a 17th century erotic Chinese story named The Carnal Prayer Mat and follows a young scholar named Yangsheng who gets married to the beautiful daughter of a local merchant.