Presented by John Wilson.
Robert Downey Jr talks about his latest film, Tropic Thunder, in which he plays an Australian method actor who, cast as an African-American, dyes his skin black and remains in character even when the cameras are off.
John is joined by architect Amanda Levete to discuss the new exhibition about the Cold War era at the V&A.
John meets British sculptor Sir Anthony Caro in northern France for a special preview of his sculptures, made from twisted and rusted steel slabs, before the official opening next month.
Novelist Bidisha reviews Merlin, the new Saturday evening family drama on BBC1, which updates the legend of King Arthur's sorcerer.