- Bud Ryan
- Self - Host
- Michael Hall
- Self - U.S. Air Force
- Dave Ward
- Self - Nuclear Weapons Scientist & Professor
- Gar Alperovitz
- Self - Author, The Decision to Use the Atomic Bomb
- Harry S. Truman
- Self - President
- George Cowan
- Self - Manhattan Project Scientist
- J. Robert Oppenheimer
- Self - Physicist
- Paul Tibbets
- Self - Commander, Atomic Bomb Group
- Harold Agnew
- Self - Manhattan Project Scientist
- Ivan Oelrich
- Self - Federation of American Scientists
- Steven Leeper
- Self - Chairperson, Hiroshima Peace Culture Foundation
- Jim Walther
- Self - Museum Director, National Museum of Nuclear Science & History
- Bob Anderson
- Self - Director, Stop the War Machine
- Jeanne Pahls
- Self - Director, Stop the War Machine
- Joni Arends
- Self - Executive Director, Concerned Citizens for Nuclear Safety
- Dave Stephenson
- Self - Son of Atomic Worker
- Michael McCally
- Self - Senior Scientist, Physicians for Social Responsibility
- Carletta Garcia
- Self - Former Uranium Mine Worker
- Barbara Johnston
- Self - Author, The Consequential Damages of Nuclear War
- Lincoln Grahlfs
- Self - Atomic Veteran, Operation Crossroads
- Troy E. Wade
- Self - Former Director, Nevada Test Site
- Michael Lerner
- Self - Editor & Founder, Tikkun Magazine
- Steve Isthmuk
- Self - Boy Scout Leader
- Jerry Grimes
- Self - Boy Scout Leader
- Jim Douglass
- Self - Author, JFK and the Unspeakable
- Jonathan Schell
- Self - Author, The Nuclear Dilemma
- George Shultz
- Self - Former U.S. Secretary of State
- Yvonne Morris
- Self - Executive Director, Titan Missile Museum
- John Burroughs
- Self - Executive Director, Lawyers' Committee on Nuclear Policy
- Bernard Baruch
- Self - Wall Street Financier
- Gary Chapman
- Self - National Director, C.P.S.R.
- Kathleen Sullivan
- Self - Disarmament Educator
- Joan Halifax
- Self - Upaya Zen Center
- Emiko Okada
- Self - Hiroshima Bomb Survivor
- Sakue Hinohira
- Self - Nagasaki Bomb Survivor
- Dave Robinson
- Self - Executive Director, Pax Christi USA
- Jim Winkler
- Self - General Secretary, United Methodist Board of Church & Society
- John Dear
- Self - Jesuit Priest & Author
