The actor embarks on a journey through British myths and rituals. Plus: Nashville gets festive in Country Music Christmas. Here’s what to watch this evening

10pm, BBC Three
A festive special with a decidedly pagan twist as This Country star Charlie Cooper embarks on another gentle but earnest investigation of the ancient myths and rituals that underpin Britain’s calendar. Charlie is a little disillusioned with modern attitudes to Christmas, so he explores everything from a barrel-burning festival in Devon to a morris dancing event in Surrey. What he finds is that, just under the surface, our collective attachment to these celebrations remains surprisingly strong. Phil Harrison