Dragnet is a 1947 American crime film directed by Leslie Goodwins and starring Henry Wilcoxon, Mary Brian, Douglass Dumbrille, Virginia Dale, Don C. Harvey, and Ralph Dunn.

After examining the body and the man's clothes, Geoffrey concludes he wore a Harris Tweed coat and had Sterling pound notes on him, and therefore has to be of British origin.

He gets a beautiful flight attendant, Anne Hogan, to identify John Doe at the morgue as a Mr. Rodine, who worked as a diplomat and could pass through customs unchecked.

He meets up with Tony again, and the American colleague presents a theory about Geoff being in the U.S. to track down the gang members who were behind a very large hit on a jewelry store.

When Geoffrey speaks to the British consul he finds out that Rodine was killed a few days ago, long before the flight took place.

When they talk to the pilot, he finally identifies the man posing as Mr. Rodine as Louis Gannet, a known criminal and con artist.

He also tries to kill Geoffrey, but he is saved by Blake, an undercover policeman who has posed as a drunk and kept an eye on the Briton during the investigation.