It’s wonderful to see Dirk Bogarde at his best as Sergeant Major Coward, portraying a British prisoner of war who dedicates himself to disrupting his German jailers during the Second World War. Drawing from the real-life exploits of Mr. Coward, the film depicts how he bewildered and frustrated the enemy through various means, including escapes, digging tunnels, acts of sabotage, and even bribery. Alongside Alfred Lyn…