Johann-Nielsen Jebsen, nicknamed "Johnny", was an anti-Nazi German intelligence officer and British double agent (code name ARTIST) during World War II. Jebsen recruited Dušan Popov (who became the British agent Tricycle) to the Abwehr and through him later joined the Allied cause. Kidnapped from Lisbon by the Germans shortly before the Normandy landings, Jebsen was tortured in prison and spent time in a concentration camp before disappearing; he was presumed killed at the end of the war. Jebsen features extensively in Popov's book Spy-Counterspy.