The true story of a German agent sent to the USA in 1944 in order to stop the development of the atomic bomb.

Martin Held
as Erich Gimpel

Nadja Tiller
as Joan Kenneth

Walter Giller
as Billy Cole

Gustav Knuth
as Roger Bentley

Viktor Staal
as Oberst Sommerfeld

Claude Farell
as Inge Hagen

Heinz Drache
as Jim Newman

Günter Pfitzmann
as Korvettenkapitän Hilbig

Werner Peters
as Gefängiswärter Jonny

Stanislav Ledinek
as Mr. Brown