Comedic genius Helen Thomson (Colin from Accounts, The Importance of Being Earnest) is back on board at Sydney Theatre Company to challenge everything you thought you knew about good manners.

Directed by the legendary Simon Phillips (Rosencrantz and Guildenstern Are Dead, Priscilla: Queen of the Desert), The Unfriend is the stage debut of Steven Moffat, the writer behind mega hits Doctor Who, Sherlock and Douglas is Cancelled.

On a cruise ship, Peter and Debbie befriend Elsa, a sassy and less than sensitive American widow who demands they stay in touch. When Elsa invites herself to stay a few months later, they look her up online and learn that she’s been putting more than mushrooms into the odd casserole, with poisonous results. Now, the couple must race to protect their family whilst avoiding the greatest faux pas of all: being, well, a bit impolite? Because guess who’s coming to… murder!