You can't get much closer to reality than in describing and recounting the circumstances and very critical instances in the emergency of having a very short time to save a child's life with the rarest possible blood group, for which three donors are needed, and the difficulties in getting them in time are constantly towering here, even mounting to criminal complications and crooked business in the field of boxing. The realism is total, the film is aptly scripted with impressing accuracy from both the views of the hospital and Scotland Yard, and the human destinies involved are gripping, especially the last one, a compromised case of innocence. The acting is equally superb, no one is overacting, everyone is natural and neutral, and they are all on equal footing. There are many films like this from England around these years, and they are generally all reliable and impeccably realistic, like Italian neorealism, no matter how prominent actors are in them. This is better and more exciting than most thrillers, and yet it is all fictional, but the reality is too convincing not to raise a certainty with the viewer that it must all be taken more or less directly from reality.