How about the money-hungry producer, John Woolf (Reece Shearsmith, Shaun of the Dead , The World’s End ), or maybe the film’s pompous, uptight screenwriter Mervyn Cocker Norris (David Oyelowo, Rise of the Planet of the Apes , Selma )? Better yet, the play’s mastermind Petula Spencer (Ruth Wilson, True Things , Saving Mr. Banks ), Petula’s seafood-loving mother (Ania Marson), or Mervyn’s cousin the amateur taxidermist Gio (Jacob Fortune-Lloyd, The Last Letter From Your Lover , Star Wars Episode IX: The Rise of Skywaler ) could be behind it all.