It's not Hitchcock quality, but this yarn about World War II espionage in New York is fast-paced fun. It lives up to its intriguing title.
Nancy Coleman plays a beautiful British agent who's hiding a big secret and trying to keep one step ahead of the Nazis. When she briefly lands in a hospital, she fakes amnesia to fool her pursuers, then confides in a young intern (played by John Garfield). Though he likes her looks, he doesn't believe a word of her story, and the two find themselves in plenty of hot water before they finally turn into an effective team.
I have read that Garfield resented having to make this movie. Maybe he preferred "serious" films to escapism, but maybe he just disliked the character he played. The young intern is really dimwitted. It takes clue after clue to convince him that the conspiracy is real. And even afterward, he keeps falling for the Nazis' tricks. He's constantly exclaiming, either with words or with his facial expression, "Gosh, now I get it!" Coleman's character is the bright one. Her spy is resourceful and tough (though more reckless than she ought to be).
The villains are the real stars here. Raymond Massey is always terrific as a manipulative fiend, and Moroni Olsen keeps up with him as his fellow ringleader. When the two ruthless Nazis turn on the charm and pull the wool over decent people's eyes, you want to laugh and hiss at the same time. The contrast between their skillful charade and the transparent thuggery of their minions (played by such veteran heavies as John Harmon and Ben Welden) adds some comic relief.
The end is fairly predictable and less clever than the beginning. (This is not Hitchcock, as noted before.) But unless you truly hate romantic spy films, "Dangerously They Live" will give you a few smiles.