The 1960 Inger Stevens Twilight Zone version is far more haunting than the 1986 Rutger Hauer-Thomas C. Howell vehicle.
Two problems with the Stevens episode: (1) She’s supposed to be driving across the country but she all does is drive around 1960-era Thousand Oaks and Agoura Hills, and (2) How does a dead woman interact with live people and make phone calls and whatnot?
But you know what works for the Twilight Zone episode in a sad, forlorn way? The spectre of an early death was invisibly hovering over the 26 year-old Stevens when this episode was shot. She only had about ten years to live — she passed on 4.30.70 of an apparent barbituate overdose.