Kelsea Ballerini is one of two country stars spotted in the trailer for a new ABC drama called Doctor Odyssey. It’s a show that explores how doctors and nurses aboard a cruise ship navigate their jobs and personal lives. Ballerini appears in the very first few seconds of the just-released trailer. Joshua Jackson (Dawson’s Creek) stars as Dr. Max Bankman in Doctor Odyssey.The crew work on a luxury cruise ship “where the staff works hard and plays harder” (per TVLine).The show premieres on ABC and Hulu on Sept. 26.Technically, this is not Ballerini’s acting debut, as she appeared during a season…