Mark and Stuart are joined by John Grant and Radiohead's Philip Selway.
BBC Radio 6 Music
Listen live (BBC Radio 6 Music homepage)
Tom Ravenscroft sits in for Steve Lamacq with classic tracks and amazing new music.
Django Django give up their bank holiday to perform live in the studio for Marc Riley.
Daniel P Carter sits in for Annie Mac and turns it up to 11!
BBC Radio 1
Cerddoriaeth newydd ar ei orau gyda Huw Stephens.
BBC Radio Cymru
Rigsy and Stuart Bailie round up the best new music from Ireland north and south.
BBC Radio Foyle
BBC Radio Ulster
Y gerddoriaeth orau ddiweddar a'r cyfle i sêr taith ysgolion C2 serenu.
Featuring live sessions and new material from the best alternative artists.
BBC Radio Scotland
Huw has highlights from the BBC Introducing stage at Reading and Leeds.