Three men gamble their lives in space to change the history of the world
as Dr. Richard Donald Stanton
as Dr. Donald L. Stanton / Narrator
as Dr. Jerry Lockwood
as Dr. Jane Flynn
as Susan Manners
as Walter Gordon
as Dr. Delmar
as Dr. Paul Dryden
as Dr. Frank Werner
as Dr. Klinger
as James O'Herli
as David Wells
as Dr. Sidney K. Fuller
