TV 12 Years Without Mercy - Season 1 Episode 4 : Chapter 4: 1940–1941 12 Years Without Mercy - Season 1 Episode 4 : Chapter 4: 1940–1941 /10 by 0 users Operation Sea Lion, the intended but never carried out amphibious landing on the British Isles, was one of the great strategic errors of the Third Reich. The lack of interest of the German General Staff was compounded by an endless series of failures by its intelligence services, while the British benefited from having managed to decipher the Enigma code. In reality, Hitler was very wary of facing the British and this led him to not accept Ridder's plan to invade the United Kingdom in early July 1940, giving rise to the Battle of Britain, one of the crucial moments of the Second World War. Details Casts Posters Images Title 12 Years Without Mercy - Season 1 Episode 4 : Chapter 4: 1940–1941 Alternative Titles Twelve Years Without Pity First Air Date 2008-11-12 Last Air Date 2008-12-17 Number of Episodes 6 Number of Seasons 1 Genres Documentary, War & Politics, Networks , Casts Adolf Hitler Plot Keywords , Self (archive footage) Adolf Hitler Episodes List 12 Years Without Mercy Season 1 :Episode 1 Chapter 1: 1933–1937 Chapter 1: 1933–1937 2008-11-12 12 Years Without Mercy Season 1 :Episode 2 Chapter 2: 1938–1939 Chapter 2: 1938–1939 2008-11-19 12 Years Without Mercy Season 1 :Episode 3 Chapter 3: 1939–1940 Chapter 3: 1939–1940 2008-11-26 12 Years Without Mercy Season 1 :Episode 4 Chapter 4: 1940–1941 Chapter 4: 1940–1941 2008-12-03 12 Years Without Mercy Season 1 :Episode 5 Chapter 5: 1941–1942 Chapter 5: 1941–1942 2008-12-10 12 Years Without Mercy Season 1 :Episode 6 Chapter 6: 1942–1945 Chapter 6: 1942–1945 2008-12-17