BBC Four TV guide

Gilbert and Sullivan's The GondoliersScottish Opera's sparkling staging of Gilbert and Sullivan's witty satire set in Venice. 22:00until 00:15 People's Palaces: The Golden Age of Civic ArchitectureTwo-part documentary in which historian Dr Jonathan Foyle explores the magnificent civic architecture of towns and cities across the north of Eng… 00:15until 01:15 Britain's Most Fragile TreasureHistorian Dr Janina Ramirez unlocks the secrets of a centuries-old masterpiece in glass. At 78 feet in height, the famous East Window at York Min… 01:15until 02:15 The Medici: Makers of Modern ArtDocumentary in which Andrew Graham-Dixon reveals how the Medici family transformed Florence through sculpture, painting, and architecture and cre… 02:15until 03:15 Alaska: Earth's Frozen KingdomThree-part series that looks at a year in Alaska, revealing the stories of pioneering Alaskans, both animal and human, as they battle the element… 19:00until 20:00 The Story of Scottish ArtIn a four-part series, artist Lachlan Goudie traces the development of Scottish art from the Neolithic Era to the present day, and looks at its i… 20:00until 21:00 Mastermind: 1977Specialist subjects include British politics and the operas of Gilbert and Sullivan. 21:00until 21:30 Call My BluffTwo teams of three alternate between giving and guessing the meanings of obscure English words. 21:30until 22:00 Rufus Wainwright: This Cultural LifeSinger-songwriter and composer Rufus Wainwright talks to John Wilson about his creative influences. 22:00until 22:30 Three's CompanyMary Marquis in conversation with poets Douglas Dunn and Craig Raine. 22:30until 23:00 Metalworks! The Blacksmith's TaleA look at how blacksmiths created items that both served and embellished society, from the earliest hinges to baroque gates and mass-produced str… 23:00until 00:00