Passenger to London is a murky spy thriller, made in Britain and lasting just an hour in length. There are no famous actors in it so it has a very low rent feel. The story sees a secret agent sending a secret message on a train journey before being murdered. His contacts in London then have to figure out the meaning of his message and also try to solve his murder at the same time. This film's the definition of a potboiler, shot at speed on the cheap and with a very familiar storyline. However, it also features enough incident and sinister characters lurking around to hold your interest throughout.

'Passenger To London' runs at just under an hour but it seems longer as it is a bit dull. Most of it is set in a small hotel. Secret blueprints are secreted in the luggage of a woman traveling to London and our heroes attempts to track down the lady and thus the plans while evading the clutches of the villains, Vautel and Veinberg (great names!). It all sorts itself out in the end. Ho hum. It could have done with more pace and excitement. John Warwick as our main hero Frank Drayton is unfortunately rather irritating but Dorothy Dewhurst as the hotel owner and Sybil Brooke as the hotel guest are entertaining at least. Jenny Laird as the girl innocently caught up in the missing blueprint business is sweet and easy on the eyes. The ubiquitous Ben Williams has a small role.The director Lawrence Huntington made better films later including the excellent 'Mr. Perrin and Mr. Traill' (1948),

The most interesting thing about this movie to me is that I didn't recognize a single name on the cast or crew lists. Oh, I know I've seen co-lead Jenny Laird before; she had roles in BLACK NARCISSUS, VILLAGE OF THE DAMNED, and a key serial of the original DOCTOR WHO, "Planet of the Spiders". However, this is a real Quota Quickie, with a plot which the characters explain to each other in dialogue, so I would imagine she, like most of the cast, were not terribly expensive. The producer directed, the music only appears at key moments and the whole thing times out at 57 minutes.Some plans have been stolen, and the agent who had recovered them for King and Country has been shot on a train. However, anticipating this, he managed to get off a note to Aubrey Pollock indicating that he has secreted them on Miss Laird. Mr. Pollock sends John Warwick to recover them. Warwick, in short order, ingratiates himself to Miss Laird, locks a couple of spies seeking the plans in their room and flees with Miss Laird, back to London for a denouement.Director of Photography Stanley Grant -- best known, probably, for special effects in IN WHICH WE SERVE -- gets one tracking shot and some nice low-key lighting to strut his stuff. However, while this film is short enough to be tolerable, there's little here to make it terribly interesting on its own terms or because of where it fits into cinema's history.

A very solid and relatively short British espionage film. A government agent is returning from France with secret blueprints that were stolen from his government. On the train ride home, thieves break into his compartment and murder him. But the agent anticipated his attackers and managed to hide the blueprints.The British government sends out another agent, this time Frank Drayton (John Warwick) tries to recover the missing blueprints. The viewer knows the blueprints have been hidden in the luggage of a female passenger on the train. While Drayton works to recover the documents he also sets out to learn who murdered his fellow agent.