" Taking place claustrophobically in the trenches just prior to the bloody Battle of the Somme with the sounds of war all around--though it could also have been taking place in the canals of Mars against aliens-- the characters are typically class-based Brits (from ineffectual aristocratic officer to working class blokes whose conversations need subtitles for American viewers), but manage to stay above stereotypes through excellent acting (with actors familiar to us from PBS's "Mystery" and "Masterpiece Theater") and personalization"