Una Mullally returns for a new series of Ceol ar an Imeall which will mark the 100th band featured on the show. In this special edition we look back at some highlight performances from that long list of acts and also get a preview of what's coming up on this year's series with the likes of Mick Flannery, Cabin Collective, My Fellow Sponges, and Daithi lined up to take to the TV screen in the name of music.