I watched an episode this morning from 2016. In it Billy's R.I.P. daughter Twilight who is 44 comes to visit. It explains how he married when a teenager after his sister and parents died in a plane crash.However you can see a Fort Worth newspaper report on the accident.I froze the programme and saw that it was dated 1949. I am confused as this would make Billy who 15 at the time to be in his late 80's when he passed away.