Operation Crossbow (1965)

"Sabotage of Hitler's ingenious weapons of mass destruction...the V1 and V2 rockets!"

Allied agents infiltrate the Nazi rocket complex at Peenemunde in order to obtain their secrets and sabotage the plant. The film alternates between German developments of the V-1 missile and V-2 rocket (with a German cast speaking their own language) and discovery by British Intelligence of the weapon.