A former horseman of the apocalypse will try to launch a country music career on Nashville next season: The Messengers’ Riley Smith has been cast as Markus Kane, the lead singer of a successful band who tries to go country when he goes solo. TV Line reports Rayna Jaymes (Connie Britton) will lure him to her new Highway 65 label with the promise of helping him lose his “mainstream” sound. But the fact that Markus is the label’s biggest act will reportedly go to his head, and primetime drama will ensue.