The actress said after Cassie’s “fantastic journey” she felt it was the right time to leave.
It is unclear when the new series of Unforgotten will air, but Casie’s replacement Sinéad Keenan said she can’t wait to begin filming.
I have long been an admirer of Chris Lang’s work, so I am absolutely delighted to be joining the Unforgotten team,” the new detective explained.
“I’m very much looking forward to working with the extraordinary cast led by the brilliant and incredibly lovely, Sanjeev Bhaskar.
“And I’m hoping that if I play my cards right I might even get to take a peek in Sunny’s backpack!”
Marriage begins tonight at 9pm on BBC One.
source: express.co.uk