An investigator seeking the cause of an airline disaster discovers the involvement of an organisation of time travellers from a future Earth irreparably polluted who seek to rejuvenate the human race from those about to die in the past. Based … Kris Kristofferson, Cheryl Ladd, Daniel J. Travanti, Robert Joy, Al Waxman, Lloyd Bochner, Brent Carver Added on HBO 2023-09-18, leaving 2024-04-01.