This is the fourteenth Bulldog Drummond film, and it is highly watchable. The performances are very good, and one wishes the plot were less implausible and the 'secret weapon' were not a mere tin contraption which any schoolboy could have put together in an hour from scraps in a school workshop. But then, we are not meant to take the plot at all seriously, we are merely meant to sit back and enjoy seeing John Howard and Heather Angel almost get married again, H. B. Warner as Colonel Nielson grumble and demand not to be called 'Inspector', E. E. Clive as Tenny the Butler say 'I rather thought so, sir' in his own inimitable way, and Reginald Denny as Algy Longworth be an endearing bumbling fool as usual: 'You mean you're not dead, Hugh?' 'Not even a bit dead, Algy.' George Zucco is a wonderfully convincing and menacing villain, as he was to be so many more times. One surprising development is that Claud Allister, the original Algy Longworth as far back as Ronald Colman days, who in his time had seen many a Drummond come and go, appears in a serious straight role as a distinguished friend of the Commissioner, which he does very well. Perhaps they were giving a part to an old pal, or Allister wanted to show that he could be a jolly good straight actor, have a deep voice rather than a high-pitched effete whinny, and look as if he were not a dolt, - at all of which he succeeds admirably. Heather Angel is delightful, the diametrical opposite to the cringeing, whimpering and helpless Joan Bennett who in earlier times draped herself in Colman's arms like a water hose which has just squirted its last. The clouds of war are gathering in this 1939 film. There are secret agents of foreign powers willing to pay a million pounds for a ray which detonates guns at a range of half a mile. One senses the danger in the air, despite all the silliness. One wonderful touch in this film is the presence of a trained talking raven. He has a role in the plot, and even shares the last frame. We could have done with more of that raven.