"This is a superb drama that offers a typical "What If" scenario of the Cold War era; with this in mind, it can be somewhat heavy-going and decidedly paranoid but the intelligent script (by Rod Serling), taut direction and all-round fine performances by a star-studded cast make this a gem, as well as a sure-fire example of the quality (often eclipsing the cinema work of many of those involved!) of TV productions during the medium's Golden Age"