- Lynne Adams
- Reporter
- Wesley Addy
- Secretary of War Henry L. Stimson
- Allen Altman
- Joseph Stiborik
- Bernard Behrens
- Asst. Secretary of War John J. McCloy
- James Bradford
- Adm. Ernest J. King
- Mark Camacho
- Charles Sweeney, Pilot
- J. Winston Carroll
- Chief Justice Stone
- Serge Christiaenssens
- Joseph Stalin
- Dan Corby
- Sailor
- Jeffrey DeMunn
- J. Robert Oppenheimer
- Tedd Dillon
- John Kuharek
- Strahil Goodman
- Stalin's Interpreter
- Roger Dunn
- Reporter
- Domenico Fiore
- Harold Urey
- Frank Fontaine
- Reporter
- Colin Fox
- Secretary of the Navy James Forrestal
- Ron Gabriel
- Press Secretary
- Sean Gallagher
- Sailor
- Alain Goulem
- Robert Lewis
- David Gow
- Col. Paul Tibbets
- David Hemblen
- Steve Early
- Arthur Holden
- Map Room Officer
- Ken Jenkins
- Secretary of State James F. Byrnes
- Gary Krawford
- Potsdam Official
- Sheena Larkin
- Bess Truman
- Richard Masur
- Gen. Leslie R. Groves
- Michael McGill
- Photographer
- Jason Meloche
- Sailor
- John R. Moore
- Sailor
- John Sanford Moore
- Sailor
- Robert Morelli
- William Blanchard
- Martin Neufeld
- Morris Jeppson
- Leni Parker
- Margaret Truman
- Tim Post
- Thomas Ferebee
- Erwin Potitt
- Prof. Hoffmann
- Charles Edwin Powell
- Kermit Beahan
- Leon Pownall
- Gen. George C. Marshall
- Philip Pretten
- Charles Bohlen
- Tom Rack
- Under Secretary of the Navy Ralph Bard
- Gary Reineke
- Capt. William 'Deke' Parsons
- Kurt Reis
- Gen. Thomas T. Handy
- George R. Robertson
- Adm. William D. Leahy
- Saul Rubinek
- Leo Szilard
- Frank Schorpion
- Frederick Ashworth
- Neil Shee
- Newsreel Announcer
- Martin Sims
- Wyatt Duzenbury
- David Siscoe
- Jacob Beser
- Cedric Smith
- Gen. Curtis LeMay
- Dennis St John
- Walter Bartky
- Paul Stewart
- Photographer
- Amanda Strawn
- Louise
- Al Vandecruys
- Duty Officer
- Vlasta Vrana
- Gen. Tom Farrell
- Len Watt
- Journalist
- Kenneth Welsh
- President Harry S Truman
- Timothy West
- Prime Minister Winston Churchill
- Jaimz Woolvett
- George Caron
- Eleanor Yeoman
- Eleanor Roosevelt
- Richard Zeman
- Flight Engineer
- Taisaku Akino
- Lt. Col. Sejima
- Kazuo Arai
- Tadahiko Okada
- Taizo Ariga
- Equery
- Bungo Fukawa
- Cadet
- Takanori Hamachika
- Officer
- Akira Hamada
- Koshito Kawabe
- Katsuhiro Haneda
- Hiroshima Kenpei
- Tomoya Harunobe
- Officer
- Hiroshi Hasegawa
- Tadaatsu Ishiguro
- Yûzô Hayakawa
- Koshiro Oikawa
- Yukio Hiramatsu
- Officer
- Ryûichi Horibe
- Col. Sato
- Kiyohiko Ichihara
- Kenpei Commander
- Hisashi Igawa
- Foreign Minister Shigenori Togo
- Hiromasa Ikegami
- Koremichi Anami
- Hitone Imabuchi
- Female Attendant
- Kazuko Imai
- Tome Aoki
- Koji Imai
- Radio Announcer
- Koji Imaizumi
- Cadet
- Zen'ichi Inagawa
- Kiichiro Hiranuma
- Masao Ishiguro
- Masao Yoshizumi
- Keiko Itô
- Sumie Kishikawa
- Tetsuya Itoh
- Tuskizo Akinaga
- Takunori Kanda
- Cadet
- Ayami Kashima
- Etsuko Kishikawa
- Kazuo Katô
- Prince Konoye
- Osamu Katô
- Naoyoshi Murase
- Setsuko Kawaguchi
- Takigawa
- Kusuo Kita
- Sumihisa Ikeda
- Genki Kobayashi
- Yoskitaka Aoki
- Yasunaga Kobayashi
- Cadet
- Muromaru Koda
- Gen. Umezu
- Shigeru Kôyama
- Adm. Yonai
- Sakae Koike
- Adm. Toyoda
- Masakazu Kondo
- Cadet
- Akira Kubo
- Sadajiro Toyoda
- Ken Maeda
- Minister of War Koreshige Anami
- Senzaburô Makimura
- Hajime Suzuki
- Asao Matsumoto
- Helgoro Sakurai
- Takashi Matsumoto
- Masahiko Takeshita
- Tatsuo Matsumura
- Prime Minister Kantaro Suzuki
- Yusuke Mine
- Toji Yasui
- Noboru Mitani
- Suekichi Aoki
- Arima Mitsutaka
- Zenshiro Hoshina
- Kayoko Moriyasu
- Toshiko Anami
- Hiroshi Nakagawa
- Cadet
- Yoshimizu Nasu
- Cadet
- Kazuki Ogawa
- Koremasa Anami
- Chian Oi
- Cadet
- Norihiro Sakai
- Radio Announcer
- Kei Satô
- Koichi Kido
- Hiroshi Shimizu
- Lt. Col. Shiizaki
- Akira Shinjo
- Officer
- Toshi Shioya
- Hisatsune Sakomizu
- Haruka Sugata
- Aya Anami
- Giichi Sugi
- Chamberlain Hasunuma
- Shinya Suzuki
- Cadet
- Kôji Takahashi
- Gen. Anami
- Kenji Takakura
- Cadet
- Kazumasa Takemoto
- Maj. Hatanaka
- Motoharu Tamura
- Hosaku Hirose
- Hajime Taniguchi
- Cadet
- Keiko Tanimura
- Female Attendant
- Hajime Tawara
- Imperial Navy Instructor
- Akira Terao
- Taro Kishikawa
- Motohiro Toriki
- Maj. Matusumoto
- Naohiko Umewaka
- Emperor Hirohito
- Taeko Usami
- Female Attendant
- Akiko Yamada
- Female Attendant
- Kensho Yamamoto
- Lt. Col. Inaba
- Mitsuru Yamazaki
- Hiromasa Matsusaka
- Naoki Yoneda
- Cadet
- Tatsuzo Asai
- Self - Testimonial Interviewee
- Michiko Benevedes
- Self - Testimonial Interviewee
- Sigurd Carlson
- Self - Testimonial Interviewee
- Clark Clifford
- Self - Testimonial Interviewee
- Robert Christy
- Self
- Jack Dairiki
- Self - Testimonial Interviewee
- Yasuo Fujita
- Self - Testimonial Interviewee
- Toshio Fukada
- Self - Testimonial Interviewee
- Yoshiko Hashimoto
- Self - Testimonial Interviewee
- Del Herndon
- Self - Testimonial Interviewee
- Leo M. Johnson
- Self - Testimonial Interviewee
- Kouichi Kamata
- Self - Testimonial Interviewee
- Yoshitaka Kawamoto
- Self - Testimonial Interviewee
- Mizuha Kikuzaki
- Self - Testimonial Interviewee
- Robert Krohn
- Self - Testimonial Interviewee
- Koreyoshi Kurahara
- Self
- Robert Leahy
- Self - Testimonial Interviewee
- Sid Margolis
- Self - Testimonial Interviewee
- Yohito Matsushige
- Self - Testimonial Interviewee
- Joe McKibben
- Self - Testimonial Interviewee
- Sadao Mogami
- Self - Testimonial Interviewee
- Minoru Momoi
- Self - Testimonial Interviewee
- Hichiro Naemura
- Self
- Suzuko Numata
- Self - Testimonial Interviewee
- Reiko Okada
- Self
- Ward Redshaw
- Self - Testimonial Interviewee
- Toshisuke Saito
- Self - Testimonial Interviewee
- Toshio Sekiguchi
- Self - Testimonial Interviewee
- Leon Smith
- Self - Testimonial Interviewee
- Kaz Suyeishi
- Self - Testimonial Interviewee
- Akihiro Takahashi
- Self - Testimonial Interviewee
- Thomas Tanemori
- Self - Testimonial Interviewee
- Setsuko Thurlow
- Self - Testimonial Interviewee
- Edward Teller
- Self - Testimonial Interviewee
- Kennosuke Torisu
- Self - Testimonial Interviewee
- May Yamaoka
- Self - Testimonial Interviewee
- Momoko Yonada
- Self
- Douglas MacArthur
- Self
- Clement Attlee
- Self
- James Byrnes
- Self
- Winston Churchill
- Self
- Hirohito
- Self (tours bombed city)
- J. Robert Oppenheimer
- Self
- Joseph Stalin
- Self
- Harry Standjofski
- Flight Surgeon Young
- Harry S. Truman
- Self
