Absolutley ridiculously implausible from start to finish. Why was Thorndike hiding back in England from the German agents when he could have gone to the government (his brother was a lord) and told everything? Why did the Germans chase him around England for his signature? On the verge of invading Poland, would an admission by a British big game hunter really have proved anything worthwhile? Just silly. Joan Bennett's character was stuck somewhere between prostitute and schoolgirl with an awful accent.