Don't listen to the negative reviews

Clever, believable, and super fun to watch. It totally has replay value.

This movie tries so hard to be funny, yet it falls flat every time. Just another example of recycled ideas repackaged with women in an attempt to appeal to a certain audience.

Actress is magnificent and exudes a hypnotic screen presence in this affecting drama.

THE SILENT ENEMY is a fine WW2 movie of the kind the British used to make so well. This one boasts an interesting, fact-based story about a little known theatre of war and an exceptional ensemble cast who really bring life to the various roles. Laurence Harvey plays an enthusiastic young officer who is shipped off to Gibraltar to help combat the threat of Italian frogmen who have been mining and destroying Allied shipping trying to access the Med.Harvey, who sports stubble and blond hair in this film, is playing the real-life wartime diver 'Buster' Crabb, the man who died in mysterious circumstances shortly before this film was made. Harvey usually plays insufferable characters but he's very good here, strong-willed and perfectly heroic. I'm not usually a fan of underwater-themed movies as I found they're usually let down by lacklustre underwater photography, but this film's different; the action scenes are highly suspenseful and complimented by strong special effects work.I liked the way that THE SILENT ENEMY is a film that focuses on technology and the apparatus of war while being readily accessible to the layman viewer at the same time. The supporting cast includes a great role for Sid James who brings some of his dry humour to a serious production and the likes of Michael Craig, Dawn Addams, Nigel Stock, and David Lodge. I was also pleased to see a bunch of youthful and famous Italian actors playing their countrymen: Gianna Maria Canale, Massimo Serato, and Giacomo Rossi-Stuart are all present here before they became big faces in Italian genre cinema of the 1960s.

The Brits produced some fine war films in the late 40s and 50s, and this one is watchable. Lawrence Harvey leads a team of underwater demolition men against the Italian frogmen who are attaching mines to ships in the harbor at Gibralter and blowing them up. The climax comes when a large convoy arrives and pauses for a few days before bringing supplies and reenforcements to the Eighth Army in North Africa. The Italian unit, just across the border in Algeciras, Spain, a neutral country, is bound to attack it. Can they be stopped? Harvey and his mates are going to give it a try.This doesn't meet the criteria for polish and effect met by some other films of the period -- say, "The Dam Busters" or "Dunkirk", but if it's long and tiring, it has some things going for it. Lawrence Harvey is surprisingly good at the real-life Lieutenant Crabbe. Sid James is first rate as the Chief Petty Officer who brusquely but kindly teaches the team how to carry on. Dawn Addams, as a Wren officer, is delicious but has little to do. The tension of the training and the missions is leavened with some humor. Addams is leading the team to their quarters in a crumbling old fort. "That's a proper bastion," observes one of the men. James: "Watch your language -- ladies present!" In its early years, the war between the Brits and the Italians was often a gentlemanly affair and that's reflected in this film. We get to know the members of the Italian unit. And when one of their casualties is found by Harvey, the corpse is buried at sea with ritual respect. In North Africa, the Italians surrendered in droves, as many did in Sicily. Not because of cowardice but because Mussolini had gotten the nation into an increasingly unpopular war and because many Italians of the time owed their allegiance less to the state than to primary institutions like the family. In "The Godfather," Sonny Corleone makes the same point when he twits Michael for joining the Marine Corps. There were of course some excellent men fighting for Italy, especially a number of daredevils in the air force.The fronts in North Africa shifted back and forth and captured men from both sides went "in the bag." One was an Italian nobleman. The Italian government offered a ransom for his return -- I forget the amount -- but it was so small that the exalted POW was insulted at the amount and refused to return to Italy. Better to lose freedom than dignity.So, though it's no masterpiece, not "The Cruel Sea," neither is it as bad as some others of the time, like "The Gift Horse." And it has its exciting moments.

I beg to disagree with those who see this movie as a great historical testament. It is a good war movie but it shows how in the Fifties, Brtain had still to come to terms with Italians outsmarting the Royal Navy. In the movie Crabb blows up the Olterra, the merchant ship secretly transformed by the cunning Italian frogman into a base for their submarines. I suppose to great amusement of the British audience. Reality is quite different. In fact, the "olterra" was never discovered by the British and actually, the very night in which Italy announced the armistice with the Allies, the 8th of September 1943, the frogmen were planning an attack. Only after the armistice, the trick was made known to the Royal Navy. Nothing was discovered, nothing was blown up except the British ships.Good war novel, poor historical testimony. Must have been a role model for the Americans who, according to Hollywood, discovered enigma on a U-boot!

I first saw this film many years ago and was impressed even then with the realism and gritty nature it had given its age and the comparable output of the era.British film fans will relish in an early role of Sid James proving he can act and plays the grizzled character very well indeed. Laurence Harvey excels as the leading character and the rest of the cast works extremely well indeed. There is very little jingoism in the film and its all the better for it and well worth a watch whenever its shown on TV.Damn good to watch and based on real events of the time and exploits of the brave men of all sides who fought in the war.