Characters

It's all about character this week, as I introduce four of the most memorable characters in the Discworld. Three of them, Mustrum Ridcully, the Bursar, and the Librarian are on the faculty of Unseen University in Ankh-Morpork, and the fourth is Sam Vimes, member of the city watch and probably the most richly-developed of all Terry Pratchett's characters.  You also get to hear a bit about Holly and Ivy, as well as how the name of the show and the on-air name of its host came to be.