Country music star Kane Brown makes his acting debut in the new episode "Off the Rails," playing Robin, a charming, modern-day train hopper who helps injured patients at the scene of a crash. Robin is something of a contemporary Robin Hood – an outlaw on the run who has a heart of gold (and perfect pitch). Max Thieriot, Billy Burke, Kevin Alejandro, Diane Farr, Stephanie Arcila, Jordan Calloway and Jules Latimer also star.