Among the guests on Graham's sofa tonight: freshly knighted Sir Idris Elba, back for season 2 of hostage thriller Hijack, The Hobbit and Sherlock star Martin Freeman, talking about Netflix series Agatha Christie's Seven Dials, The Crown and Adolescence star Erin Doherty, discussing the new series of Victorian drama A Thousand Blows, award-winning Wunmi Mosaku, starring in period horror movie Sinners and triple-BRIT-nominated singer-songwriter Olivia Dean, performing So Easy (to Fall in Love) from her current album The Art of Loving.