Unforgotten spoilers follow.
Unforgotten aired its series four finale this evening (March 29) and after the last episode's tragic cliffhanger, which saw DCI Cassie Stuart become involved in a car crash, it's safe to assume that viewers were expecting some heartbreak.
Chances are, they weren't expecting as much as tonight's instalment dished out though.
The episode opened with an unconscious and bloodied Cassie (Nicola Walker) being whisked off to hospital, as her colleague Sunny Khan (Sanjeev Bhaskar) received news of her location, rounded up her family and rushed to her bedside.
Soon after, the doctors explained that she would need surgery as soon as possible, to which her loved ones gave the go-ahead.
Later, Sunny returned back to work, having been informed that the driver of the vehicle that ploughed into Cassie's might have been one of the people they believe could have killed Matthew Walsh, whose headless and handless remains had been found in the freezer at the start of the season.
While he busied himself quizzing lead suspect DCI Ram Sidhu (Phaldut Sharma) and Dean Barton (Andy Nyman) – the latter of which turned out to be the murderer – though, Cassie's condition worsened.
"We knew from our scans that she'd had a bleed on the brain, but when we opened her up, it was actually substantially worse than we'd feared," the surgeon told her loved ones. "Someone with that level of damage is, I'm so sorry to say, unlikely to recover brain function."
Devastated by the news, Cassie's father Martin (Peter Egan) stormed out of the hospital and parked himself on a bench outside the building. There, he played back an old voicemail left on his phone by his daughter, as he choked up at the sound of her saying "I love you so much."
The finale concluded with Sunny going to visit Cassie's grave, as he could be heard speaking at her funeral via voiceover: "She was the best I've ever met. It didn't matter if you were a victim of crime, or had taken the wrong path yourself. She treated you the same. Her place was not to judge. It was to pursue the truth, and she did that affording everyone she interacted with the same honesty, good manners and unfailing fairness.
"People like Cass Stuart are extraordinary. So we can be sad that we've lost someone we adored and who we will miss everyday. But we can also be grateful for the time we did have with her, and for the impact she had on all our lives. Cass Stuart was my colleague. She was my mentor. She was my friend, and I loved her."
Check out some reactions to the finale below, including Bhaskar's...
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