Guest Stars Julian Barratt as Benjy Dhillon Karl Johnson as Bill Newman Maya Sondhi as Lola Dartmouth Derek Jacobi as Sir Ralph Unwin Siân Reeves as Claudia Rose Sandra James-Young as Regina Liz Crowther as Joyce Ransome Chandrika Chevli as Priana Fisher Romola Garai as Juno Fish Natasha Culzac as Kelly John Cummins as JD Doyin Ajiboye as Chioma Ella Critchell as Poppy Thomas Kadman as Lionel