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Bafta-winning actress Anna Maxwell Martin will be returning to our screens as Detective Chief Superintendent Patricia Carmichael from this Sunday.
Episode four of the latest series left viewers with a massive cliffhanger, as AC-12 makes a huge breakthrough in the investigation, but their attempt to interview a key witness goes wrong. And now it looks like they've brought in their secret weapon: Carmichael.
We last saw the no-nonsense DCS Carmichael during series five, when she was drafted in as an independent investigator from AC-3 after the integrity of Superintendent Ted Hastings roused suspicions.
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