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Unforgotten's Sanjeev Bhaskar teases Cassie's replacement in season 5
Unforgotten spoilers follow. Unforgotten's Sanjeev Bhaskar has opened up about his co-star Nicola Walker's replacement on the show's new season. Following Unforgotten's shock season 4 finale, which saw DCI Cassie Stuart killed off in a car crash, DI Sunny Khan was left alone without a partner for the first time during the series' four-year reign.