Tonight, Jools welcomes Feist back to the studio. The Canadian singer-songwriter first appeared on the 200th show in February 2008 and returns to showcase songs from her brand new Metals album. Also returning to the show is Justin Vernon, aka Bon Iver, who has been working with both Kanye West and James Blake since his debut on the show in 2010. He released his self-titled second album earlier this year - the follow-up to For Emma, Forever Ago - from which he performs a couple of tracks. Jools introduces legendary jazz pianist Buddy Greco, who worked with Sinatra and Benny Goodman and has a recording career spanning more than 60 years. From Atlanta, Georgia comes the awesome psychedelic metal power of Mastodon who perform tunes from their fifth album, The Hunter. An extended edition can be seen on Friday at 11.50pm.