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BBC Vigil viewers slam 'confusing' plot as Amy is left fighting for life in epic scenes
For more of the latest showbiz news from Daily Star, make sure you sign up to one of our newsletters hereThe biggest shock came at the end of the episode, when DCI Silva was attacked by the Russian double agent on board, CPO Matthew Doward (Lorne MacFadyen).Claustrophobic Silva, wearing an atmospheric diving suit was knocked out cold and locked inside a torpedo tube, which then began to fill with seawater.