Bon mots are essential ingredients for a cocktail party. Take inspiration from the Dowager (Maggie Smith), who lobbed a zinger into nearly every episode of the series (highlights, above). We raise a glass to her return.
In a cocktail shaker filled with ice, combine the gin, sweet vermouth and Fernet Branca. Stir until chilled, then strain into a coupe glass. Top with club soda.
Run the orange peel's orange side along the glass and twist to express the oils. Drop into the glass or perch on the edge of the glass.