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Sinead Matthews and Kevin Sutton star as Helen’s old school friend Pauala and her husband Gavin, with Clive Woods completing the cast as Helen’s dad Robert.
The BBC drama saw DI Helen Weeks (played by Buring) suffer the loss of her policeman boyfriend Paul Hopkins (Ben Batt) amid a full-term pregnancy, but fans were shocked at the size of her baby bump.
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Jessica Gunning plays DCI Sophie Carson, the officer on the field in the kidnapping case, who doesn’t appreciate Helen’s involvement.
He’s a good guy who loves her and is really excited that he’s having a baby. But you really quickly find out it’s not all it seems to be.”The first two episodes, which were filmed on location in Derbyshire, see Helen confront her demons from the past.
In the second two episodes, set in inner-city Manchester, she must tackle her present in order to secure her future.
A third person criticised the BBC's decision to include the pregnancy at all, saying: "#In The Dark More b******s from the BBC.
Improbably pregnant woman to encourage women to watch a cop show. Some fans recognised the calibre of the cast and the writing, but still couldn't overlook the silly mistake.
Taking to Twitter, many could only focus on the seemingly unrealistic prosthetic stomach, as one person posted: "Is Helen pregnant with twins and I've just missed something or have the BBC lost all sight of reality with the size of that bump?