Marnie has a life-threatening condition. The doctors believe it is in her best interests to be allowed to die, but her loving family disagree. And so begins a fight that will take them through every stage of a legal process, as they struggle to contemplate this huge decision. Who decides? And in whose best interests will it be?

Sharon Horgan, Michael Sheen, Alison Oliver, Niamh Moriarty, Noma Dumezweni, Chizzy Akudolu, Des McAleer, Gary Beadle, Jack Morris, Pippa Haywood, Shane Zaza, Lucian Msamati, Lisa McGrillis, Mat Fraser