Jack Lord

as Det. Steve McGarrett

Nancy Kwan

as Rosemary Quong

Leslie Nielsen

as Brent

Andrew Duggan

as Miller

James Gregory

as Jonathan Kaye

Khigh Dhiegh

as Wo Fat

Lew Ayres

as The Governor

Tim O'Kelly

as Danny

Newell Tarrant

as Doc

Zulu

as Kono

Kam Fong

as Chin Ho

Philip Ahn

as Attorney General

Mitzi Hoag

as May

Noah Keen

as Dr. Bernard

Russell Thorson

as Port Captain

Wright Esser

as Capt. Schroeder

Yankee Chang

as Tour Bus Driver

Iris Rainer

as Jailed Hippie Girl

Dale Ishimoto

as Arcturus Construction Guard

Soon-Tek Oh

as Wo Fat's Lab Technician

Mark LeBuse

as Arcturus Construction Foreman

Maxine Jennings

as Mildred - Governor's Secretary

Bill Saito

as Burglar

Gertrude Flynn

as Landlady

Baird Miller

as Agent Tailing McGarrett

Richard Kuga

as Wo Fat's Lab Assistant

William Boyett

as Agent in Brent's Office

Helen Torco

as Hula Dancer