Professor Brian Cox joins Shaun for his weekly science chat.
BBC Radio 6 Music
Nemone sits in for Lauren Laverne and hears a listener's Biorhythms.
Stuart Maconie presents solo and is joined by Norman Blake from Teenage Fanclub.
Steve Lamacq plays classic tracks and amazing new music.
Marc Riley has a live session from the Hayman Kupa Band, aka Darren Hayman and Emma Kupa.
Rag N Bone Man plays live, plus the Big Moon drop in on Huw with their brand new single.
BBC Radio 1
Ana Matronic sits in for Jo with some of her favourite music, plus a few disco classics.
BBC Radio 2
Phil Taggart sits in for Huw and It's Album Time with future pop trio Beaty Heart.
A look back at Radiohead's Mandela Hall gig of June 1997.
BBC Radio Foyle
BBC Radio Ulster