The story of Buzz Aldrin, the second astronaut to walk on the moon, and the problems he had after his return to Earth, including the breakup of his marriage, a nervous breakdown and his hospitalization for psychiatric problems.

Cliff Robertson
as Col. Edwin A. 'Buzz' Aldrin Jr.

Shirley Knight
as Joan Aldrin

Charles Cioffi
as Dr. Sam Mayhill

Ralph Bellamy
as Col. Edwin E. Aldrin

Stefanie Powers
as Marianne

Kraig Metzinger
as Andy Aldrin

Tony Marks
as Mike Aldrin

Stephen Pearlman
as Dr. Hotfield

Stefan Gierasch
as Al Davis

Mark Roberts
as