This is easily the best episode of 2007, and indeed one of the best stories I have heard on EP. It's got everything- an intelligent machine who loves poetry and singing, criticism of militarism which doesn't go into political preaching, a Douglas Adams-style humour, plenty of action, betrayal, mars, hi-tech weaponry, death, a fantastic narrator, patriotic hymns, a truly unexpected twist at the end (who would have thought he'd end up as a museum exhibit?).
My only criticism is that I saw the soldier's pretend betrayal, and Tortuga's reaction to it, a mile off.
More from this author please!