Overview: Joining Graham on his virtual sofa are: global pop superstar Lady Gaga, talking about her new album Chromatica; Captain America Chris Evans and Downton's Michelle Dockery, together in crime drama series Defending Jacob; Hollywood star Josh Gad (Frozen, and Beauty and the Beast), in new musical animated sitcom Central Park; and Chewing Gum star Michaela Coel, in new BBC drama I May Destroy You. Singer-songwriter Niall Horan chats and gives a home performance of his single Black and White.