In 1943, a team of code breakers led by Tom Jericho (Dougray Scott) is facing an uphill challenge to react to an alteration to the Nazis\' changing their secret communication code. With the help of his lover\'s resourceful flatmate, Tom makes a breakthrough but this in turn opens up a whole other can of worms.

3
Mainly it`s the murky plotting and the disappointing denoument which, though it might have its basis in fact, is a bit too convoluted.

Tom Jericho, Dougray Scott, is a brilliant mathematician who works as a code-breaker at Bletchley Park, a top secret World War II facility. Jericho has had an affair with fellow worker Claire Romilly, Saffron Burrows, and when she ended their relationship he had a breakdown. Now he`s back at work, but Claire has mysteriously disappeared. While Jericho and Claire`s room-mate, Hester, Kate Winslet, try to solve the mystery of her disappearance, MI5 agent Wigram, Jeremy Northam, becomes increasingly suspicious. The combination of director Michael Apted and screenwriter Tom Stoppard, plus a fascinating wartime spy story, should have added up to a more interesting film than Enigma. For a while, the intriguing backdrop of the code breaking centre, the desperate attempts to break a new German code before a convoy of merchant ships is destroyed by U-boats, and the mysterious disappearance of the seductive Claire look like the basics for a pretty good thriller. But something`s not right - perhaps it`s the casting of Dougray Scott, the most dour, uncharismatic hero imaginable, or perhaps it`s the unlikeliness of the Jeremy Northam character - did MI5 officers really dress so well during the war? But mainly it`s the murky plotting and the disappointing denoument which, though it might have its basis in fact, is a bit too convoluted. The film`s biggest asset is Kate Winslet, lovely as the rather Hitchcockian heroine, a jolly English girl who exhibits unexpected talents as a detective.