Line of Duty fans reckon the show’s latest cliffhanger has been ruined by a BBC blunder.Sunday’s episode ended with DI Kate Fleming caught up in a shootout.Viewers were left fearing the heroine, played by Vicky McClure, 37, had been killed after gunshots were heard just before the credits rolled.But footage aired by the Beeb in a trailer for the hit drama last month appears to prove she survives.Kate is seen standing in front of a car alongside fellow cop Joanne Davidson (Kelly Macdonald, 45).Eagle-eyed fans spotted the apparent gaffe within minutes of the cliffhanger airing and posted the clip on social media.It means thousands of viewers now reckon they know what happens.One fan posted: “Screen grab from #Lineofduty session 6 @BBC.
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