The sprawling new ABC drama “Nashville” (premiering at 10 p.m. on Channel 5 on Thursday) plans to cover a lot of ground as it chronicles the rivalry between the established-but-waning star Rayna Jaymes (Connie Britton, “Friday Night Lights”) and the country crossover upstart Juliette Barnes (Hayden Panettiere, “Heroes”). The show is also steeped in the sounds and scenes of Nashville. Sarah Rodman talks to the stars and creators of the show.
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