Karen leads a team investigating one of the most notorious cases in Scotland's history in the second season's mystery.
The Streamable on MSN
Just signed up for BritBox? Watch 'Line of Duty' first
With six twist-filled seasons and a mystery that won’t quit, this is BritBox at its best. I’m a sucker for a dark crime drama, from “True Detective” to a British show like “Luther.” And if you just ...
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