伦纳德·尼莫伊

Leonard Nimoy

饰：Narrator

Roberta L. Bondar

饰：Herself- Payload Specialist

Ronald J. Grabe

饰：Himself- Commander STS-42

David C. Hilmers

饰：Himself- Mission Specialist

Ulf D. Merbold

饰：Himself- Payload Specialist

Stephen S. Oswald

饰：Himself- Pilot STS-42

William F. Readdy

饰：Himself- Mission Specialist

Professor Lyman Spitzer

饰：Himself (as Professor Lyman Spitzer)

Norman E. Thagard

饰：Himself- Mission Specialist

Eric DeJong

饰：Himself

Lyman Spitzer

饰：Himself

伦纳德·尼莫伊

Leonard Nimoy

饰：自己