‘The Diplomat’ U.K. Prime Minister on the Operatic Way He Learned of His “Shocking” Season 4 Storyline

British Prime Minister Nicol Trowbridge resigns midway through season four of *The Diplomat*, in a startling scene that follows a surreal episode in which he imagines a dead adviser is alive and sings an aria. His departure reshapes the political relationships at the centre of the Netflix thriller, forcing US ambassador Kate Wyler and her team to adjust to a changing cast of British officials.

Showrunner Debora Cahn says the change reflects the instability of recent UK politics and lets the series explore how a difficult working relationship shifts when one person leaves. Actor Rory Kinnear knew Trowbridge would resign, but learnt about the singing when Cahn sent him an aria as he was boarding a flight to Lithuania. The resignation follows Kate threatening to expose Trowbridge’s role in events surrounding the carrier ship attack.