Chris Evans and Alex Jones are joined by comedian Jimmy Carr.Entertainment is courtesy of 275 members of Rock Choir, who perform some festive hits as well as a big tune to end the show.If you are worried about the cost of Christmas this year, Dan Donnelly meets a woman who can create a lovely three-course Christmas lunch for less than £4 a head.And Cerys Matthews looks at a story by Dylan Thomas that sums up the magical nature of childhood Christmases.