The Unknown Mission was released in the year 1989。The Unknown Mission is also called as Millennium, På sporet af fremtiden, Millennium - Guardiões do Futuro, Millennium - Die 4. Dimension, Millenium, Entführung in die Zukunft。

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 on a novel by John Varley.

The Unknown Mission actors and actresses include Al Waxman, Cheryl Ladd, Eugene Clark, Lloyd Bochner, Maury Chaykin, Michael J. Reynolds。