Lancaster was put in charge after impressing during an interim stint.
A new three-part documentary, "Superpowered", charts the 90-year history of DC Comics, which brought the world "Superman", "Batman", "Wonder Woman" and countless other superheroes. Does the simplistic black-and-white morality of superhero stories still have a place in today's world?
Strumming his acoustic steel string guitar on a busy street in east London, 27-year-old Australian singer-songwriter Dan Tredget is a man on a mission. Tredget is already envisioning future challenges, including the possibility of extending beyond the Underground to include the Overground and the Docklands Light Railway in east London.