Eva Sweeney

Young Maureen Flavin Sweeney

Colin Wright

General Dwight D. Eisenhower

Mike Johnson

Captain James Stagg

John Downes

Met Éireann Telephone Operator

Antony Beevor

Self - Historian

Robert Gerwarth

Self - Historian

Susan Eisenhower

Self - Eisenhower's Granddaughter

Joseph Skelly

Self - Historian

Richard G. Trefry

Self - Retired US Army Lt. General

Maureen Flavin Sweeney

Self - Weather Observer (1944)

Gerald Fleming

Self - Meteorologist

David McCullagh

Self - Journalist

Catherine Ross

Self - British Met Office Archivist

Jeremy Green

Self - British Military Police Colonel

Rodney Teck

Self - Climate Researcher

John C. Sweeney

Self - Climate Researcher

Vincent Sweeney

Self - Lighthouse Keeper

Richard Callaghan

Self - Royal MP Museum Curator

Joe Cattini

Self - D-Day Veteran

Adolf Hitler

Self - Politician (archive footage)

Bernard Montgomery

Self - British Military (archive footage)

Dwight D. Eisenhower

Self - US Military (archive footage)

Éamon de Valera

Self - Politician (archive footage)

Erwin Rommel

Self - German Military (archive footage)

Franklin D. Roosevelt

Self - Politician (archive footage)

James Stagg

Self - Meteorologist (archive footage)

Joseph Goebbels

Self - Politician (archive footage)

Joseph Stalin

Self - Politician (archive footage)

Winston Churchill

Self - Politician (archive footage)