Code Name: Diamond Head

Roy Thinnes

— Johnny Paul

France Nuyen

— Tso-Tsing

Zulu

— Zulu

Ward Costello

— Captain Macintosh

Don Knight

— H.K. Muldoon

Ian McShane

— Sean Donovan / Father Horton / Colonel Millard Butler

Eric Braeden

— Ernest Graeber

Dennis Patrick

— Commander Yarnell

Alex Henteloff

— Dr. Edward Sherman

Frank Michael Liu

— Hikaru Sakai

Eric Christmas

— Father Murphy

Ernest Harada

— Hero Yamamoto

Harry Endo

— Dr. En-Ping

Lee Stetson

— Tanner