Shereen Nanjiani has a new girl on her team of reviewers for this week's top stories. Margaret Gibson of the Prince's Scottish Youth Business Trust joins the Herald's foreign editor David Pratt and Professor of Politics Sarah Oates - a lively line up to tackle some hot topics - the row over Boris Johnson's ethnic cleansing jibe, Barack Obama's likely fate in the midterm elections, changes to Scottish justice and a whole lot more. Shereen's special guest is veteran Scottish actor James Cosmo, who cut his teeth on Dr Finlay's Casebook, made his name in Braveheart, and is now enjoying a late-career surge of popularity in Hollywood. He'll be telling Shereen about life with his unconventional family, and previewing his latest movie, Donkeys, on release here next week.