乔治·克鲁尼

George Clooney

饰：Chris Kelvin

娜塔莎·麦克艾霍恩

Natascha McElhone

饰：Rheya

维奥拉·戴维斯

Viola Davis

饰：Gordon

杰瑞米·戴维斯

Jeremy Davies

饰：Snow

乌尔里希·图库尔

Ulrich Tukur

饰：Gibarian

约翰·赵

John Cho

饰：DBA Emissary #1

艾尔皮迪娅·卡里洛

Elpidia Carrillo

饰：Friend #2

摩根·鲁斯勒

Morgan Rusler

饰：DBA Emissary #2

Donna Kimball

饰：Mrs. Gibarian

迈克尔·英塞恩

Michael Ensign Evans

饰：Friend #1

肯特·法尔考

Kent Faulcon

饰：Patient #1 (as Kent D. Faulcon)

Lauren Cohn

Lauren Cohn

饰：Patient #2 (as Lauren M. Cohn)

Shane Skelton

饰：Gibarian's Son

Ann Morgan

Ann Morgan

饰：Nurse (uncredited)

裘德·沃尔克

Jude S. Walko

饰：City Dweller (uncredited)

Tony Clemons

饰：Dinner Guest (uncredited)