The stars’ beautiful, haunting show follows a mother who sues the NHS to stop her child from dying. They open up about parental terror, inequality and dad dancing
If Best Interests – a drama about a mother who takes the NHS to court after doctors decide to allow her teenage daughter to die – feels too harrowing to countenance, you’re not alone: even the cast can’t bring themselves to watch it. “It was hard enough doing it on the day,” says Sharon Horgan of playing Nicci, the mother in question. Michael Sheen, who co-stars as her husband Andrew – a man devastated by his daughter’s illness but unwilling to back his wife’s appeal – is also avoiding it. “I’m more nervous than usual,” he admits. “I know it’s going to be a difficult watch.”
That’s an understatement. Best Interests begins with Nicci and Andrew on a train, giddily happy, slightly frisky and, as we soon realise, uncharacteristically carefree. Over the next four hours, we see their relationship falter under the pressure of caring for their younger daughter Marnie (Niamh Moriarty) who has muscular dystrophy, as consultants tell them her condition has progressed beyond all medical intervention – something that leads Nicci to mount a headline-grabbing, life-upending legal challenge. It’s little wonder Horgan had doubts about taking the role in the first place. “I was really nervous about how much this was going to fuck me up,” she says. It ended up being as crushing as she feared. “We spent a lot of time in terrible pain. You have to go to some really awful places to get yourself into that mindset and stay there. Sometimes you come home and go: ‘What kind of a weird job is this?’”
