AtelevisionadaptionofMichaelFrayn'scelebratedandawardwinningstageplayaboutthemeetingbetweenphysicistsNielsBohrandWernerHeisenbergin1941CopenhagenAtthistimetheyoungHeisenbergwasleadingafalteringGermanreseachprogramintonuclearenergy,whilethemiddleagedandapparentlyisolatedBohrwasincontactwithalliedagents,andstillheldapositionofgreatinfluenceinthenuclearphysicsresearchcommunityAfterthemeetingthetwomenputdifferentinterpretationsimpressionsofwhyHeisenbergrequestedthemeeting,andwhathehopedtogainfromit,athemewhichmirrorstheambiguityofthe"Copenhagen"interpretationwidelyusedinquantumphysicsDidHeisenberggototheavuncularBohrtoseekinghisblessingforhisroleinnuclearresearchWhydidHeisenbergconcentrateonthedevelopmentofanuclearreactor,andnotperformthecalculationsthatwouldshowthatabombcouldbemadetoworkviaafastneturonreactioninUranium235Theseandotherquestionsfeatureintheplot,althoughunsurprisinglytherefewcertainanswers