The Hebburn star, who plays Rachel Coles in the BBC detective show, joked to press including Express.co.uk at a screening for the latest episode about how her needs as a mother would effect her costumes.
“I think sometimes my boobs would get bigger and the costume girl would come down and say, ‘Oh do you need to express?’ Watch out for it throughout!” the 34-year-old joked.
Her character will also become closer to George (played by Martin Shaw) in the final two episodes as she comes to represent a female energy in his life after his wife Isabella (Maria Tecce) died.
Martin explained the input Rachel will have on the inspector in the episodes to come, saying: “He becomes close to Lisa’s character.
“He needs a bit of an emotional crutch and that comes out in the second episode.
“George having lost his wife, adopts John as his son, Rachel is his daughter and she is the replacement for the lack of female energy in his life, especially now his ‘son’ is a s***bag!” the 72-year-old explained.
Martin also explained how the final two episodes will provide a resolution to the show.
He teased: “You need to end with a symphony, with a proper big chord, and what we needed was an ending where everyone would say, ‘Phew, that’s over now’.
“It is moving, tragic and sad. It’s certainly going to be moving because we go deeper into Gently’s untouched grief,” he explained.
Inspector George Gently returns to BBC One tonight at 8:30pm.
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