“Eye in the Sky” is not the first film to tackle the moral issues associated with drone warfare – “Good Kill” was one, “Unmanned” another, but it is the best so far. Helen Mirren plays a British colonel leading a complex military operation involving Somalian terrorists. The operation unfolds unexpectedly and she has to decide what to do next under the all too watchful eyes of her immediate boss (Alan Rickman) and a cast of meddling politicians, all anxious to cover their own backsides and avoid taking morally complex decisions at all costs.