James Mason
— Y.Y. Go
Jack MacGowran
— Leo Zimmerman
Irene Tsu
— Tah-Ling
Jeff Bridges
— Nero Finnegan
Peter Lind Hayes
— Prof. Robert Bannister
Clarissa Kaye-Mason
— Zelda
Burgess Meredith
— The Dolphin
Gigo Tevzadze
— Dr. Ading
King Hu
— Ito Suzuki
Broderick Crawford
— Parker
Jay Adler
— Dr. Yul
June Sampson
— Miss Hagen
Robert Cabot
— Clay (uncredited)
Valentine Dyall
— Narrator (uncredited)
Chin Hsiao
Jen Kwan
— Funerary Procession Monk(uncredited)
Yun-Wu Li
Liv Lindeland
Chun-Ku Lu
Robert Shayne
— U.S. Senator (uncredited)