A gripping but ultimately bleak tale of a submarine in distress.
A Royal Navy submarine commanded by Armstrong (John Mills) heads off on a routine training mission. However, things go wrong when the submarine encounters a mine which explodes. The badly damaged submarine is trapped on the sea bed. Although the submarine is found by rescuers and some of the surviving crew escape, Armstrong and the last few including Stoker Snipe (Richard Attenborough) are trapped with no means of escape...
A tense drama, though a submarine will always give you that. Hope is dashed several times as the last survivors slowly realise that there will be not be a happy ending. A superb film.
