Gammera the Invincible

Albert Dekker

Secretary of Defense

Brian Donlevy

Gen. Terry Arnold

Diane Findlay

Sgt. Susan Embers

John Baragrey

Capt. Lovell

Dick O'Neill

Gen. O'Neill

Sin foto

Mort Marshall

Jules Manning

Alan Oppenheimer

Dr. Contrare

Sin foto

Steve Zacharias

Sen. Billings

Sin foto

Thomas Stubblefield

J.T. Standish

Sin foto

Gene Bua

Lt. Clark

Sin foto

Bob Carraway

Lt. Simpson

John McCurry

A1C Hopkins

Sin foto

Walter Arnold

American Ambassador

Louis Zorich

Soviet ambassador

Sin foto

Robin Craven

British ambassador

Bernard Grant

Dr. Hidaka (voice)

Sin foto

Larry Robinson

Aoyagi (voice)

Sin foto

Paulette Rubinstein

Kyoke (voice)

Sin foto

Lucy Martin

Nobuyo (voice)

Corinne Orr

Toshio (voice)

Peter Fernandez

Professor Murase / Captain Foster / New York newsreader / Mr. Ueda (voices)

Kenneth Harvey

Chidori Maru navigator (voice)

Jack Curtis

news announcer (voice)

Sin foto

William Griffis

misc. roles (voice)

船越英二

Dr. Hidaka

姿美千子

Nobuyo

Sin foto

霧立はるみ

Kyoke