Josef Jakobs SW3, on 4–5 August 1941. The trial was held "in camera" because the German agent had been apprehended in a highly classified intelligence operation known as the Double Cross System. The British were aware that Jakobs was coming because his arrival information had been passed on to MI5 by the Welsh nationalist and "Abwehr" double agent Arthur Owens. After a two-day trial which involved hearing the testimony of eight witnesses, Jakobs was found guilty of spying and sentenced to death. Jakobs's execution took place at the miniature rifle range in the grounds of the Tower of London on 15 August
Spy vs. Spy least one occasion: the strip that eventually appeared in "Mad" magazine #84 (Jan. 1964) was altered to remove scenes where the spies drink and smoke (Gaines had a strong anti-smoking stance). Prohías completed a total of 241 "Spy vs. Spy" strips for "Mad" magazine, the last one appearing in #269 (March 1987). After that he drew gag strips for the titles (such as one involving radioactive waste in #287) and wrote several stories for Clarke or Manak to draw, with his last such contribution in #337 (July 1995). The strips continued, with writer Duck Edwing and artist Bob Clarke creating