1940) (6 parts) "Buffalo Heights" (May 1940) (6 parts) "Alonzo Craig, Arctic Explorer" (May–June 1940) (6 parts) "Horace Morton's Weather Predictions" (June 1940) (6 parts) "Hans Holbein's Doll Factory" (June–July 1940) (6 parts) "Happyland Amusement Park" (July 1940) (6 parts) "Lighthouse Point Smugglers" (July–August 1940) (6 parts) "Pillar of Fire at Graves' End" (August 1940) (3 parts) "The Mayan Treasure" (August 1940) (6 parts) "Professor Thorpe's Bathysphere" (August–September 1940) (12 parts) "The Curse of Dead Man's Island" (September–October 1940) (6 parts) "The Yellow Mask and the 5 Million Dollar Jewel Robbery" (October–November 1940) (15 parts) "The Invisible Man" (November 1940) (6 parts) "The 5 Million Dollar Gold Heist" (November–December 1940) (8 parts) "The Howling Coyote" (December 1940–January 1941) (14 parts) "The Black Pearl of Osiris" (January–February 1941) (11 parts) "The Dragon's Teeth" (February–March 1941) (10 parts) "Last of the Clipper Ships" (March–April 1941) (20 parts) "The Nitrate Shipment" (April –May 1941) (9 parts) Beginning August 25, 1941, a second series of transcriptions designed to air five days per week (although many stations continued the previous three-per-week schedule) aired. These concluded after 26 weeks with the final installment of "A Mystery for Superman" airing on February 20, 1942: "The Grayson Submarine" (August 1941) (6 parts) "Dr. Deutsch and the Radium Mine" (September 1941) (12 parts) "The White Plague" (September 1941) (8 parts) "Fur Smuggling" (September–October 1941) (6 parts) "Dr. Roebling and the Voice Machine" (October 1941) (16 parts) "Metropolis Football Team Poisoned" (October - November 1941) (15 parts) "Crooked Oil Association" (November–December 1941) (10 parts) "The Silver Arrow" (December 1941) (7 parts) "The Pan-Am Highway" (December 1941–January 1942) (15 parts) "The Mechanical Man" (January 1942) (10 parts) "Lita the Leopard Woman" (January–February 1942) (12 parts) "The Ghost Car" (February 1942) (8 parts) "A Mystery for Superman" (February 1942) (5 parts) By the time the syndicated series ceased production, it was airing in 85 North American markets. In June, the Mutual Network discovered it would be losing its #1 juvenile show, Jack Armstrong, the All-American Boy to NBC's Blue Network at the end of August. To counter, MBS decided to revive the show, now officially titled The Adventures of Superman, on August 31, 1942. The new series aired live, five days a week. The revival began with two individual episodes, and then returned to the cliffhanger serial format. The stories were of varying lengths—some stories were only five parts, while others could