One of the members of The Five Fishes, recruited because of his expertise as a long-distance driver. Rolf tasks him with distributing The Five Fishes’ pamphlets all across England. Gascoigne is captured by the State Security Police while placing explosives to interrupt a Quietus, prompting Miriam to recruit Theo to drive the remaining Fishes’ getaway car—they are afraid that Gascoigne will soon “break” and give the police the Fishes’ names.