Based on the true story of an elaborate plot by British intelligence to fool the Germans into thinking the Allies were about to invade Greece instead of Sicily in 1943, this is a war film and espionage film not based on the ground where the fighting takes place, but in the offices where the planning is done. A corpse is found and given a full false identity, to be dumped off the Spanish coast with fake documents to substantiate the target of the assault. Colin Firth leads as the officer in charge of the operation, duty-driven and constantly anxious about its success.
There was a risk that it could have ended up feeling stagebound, but the complex story and dry wit of the dialogue put paid to that. That, and the novelty of seeing how much wars are actually decided behind closed doors instead of through pyrotechnics and blood.
6/10