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“Episode 251.” Mark Trail. Radio broadcast, January 25, 1952.“Investigates fossil remains near Canadian border, fur robberies, diabolical trap for him & Scotty.” Mark Trail. Radio broadcast, January 28, 1952.“Episode 253.” Mark Trail. Radio broadcast, January 29, 1952.“Episode 254.” Mark Trail. Radio broadcast, January 30, 1952.“Episode 255.” Mark Trail. Radio broadcast, January 31, 1952.“Episode 256.” Mark Trail. Radio broadcast, February 1, 1952.“Bats of Mesa Blanca - Ch1.” Mark Trail. Radio broadcast, February 4, 1952.“Bats of Mesa Blanca - Ch2.” Mark Trail. Radio broadcast, February 5, 1952.“Bats of Mesa Blanca - Ch3.” Mark Trail. Radio broadcast, February 6, 1952.“Bats of Mesa Blanca - Ch4.” Mark Trail. Radio broadcast, February 7, 1952.“Bats of Mesa Blanca - Ch5.” Mark Trail. Radio broadcast, February 8, 1952.“Invaders of Lost Forest - Ch1, The.” Mark Trail. Radio broadcast, February 11, 1952.“Invaders of Lost Forest - Ch2, The.” Mark Trail. Radio broadcast, February 12, 1952.“Invaders of Lost Forest - Ch3, The.” Mark Trail. Radio broadcast, February 13, 1952.“Invaders of Lost Forest - Ch4, The.” Mark Trail. Radio broadcast, February 14, 1952.“Invaders of Lost Forest - Ch5, The.” Mark Trail. Radio broadcast, February 15, 1952.“Swampland Mystery - Ch1, The.” Mark Trail. Radio broadcast, February 18, 1952.“Swampland Mystery - Ch2, The.” Mark Trail. Radio broadcast, February 19, 1952.“Swampland Mystery - Ch3, The.” Mark Trail. Radio broadcast, February 20, 1952.“Swampland Mystery - Ch4, The.” Mark Trail. Radio broadcast, February 21, 1952.“Swampland Mystery - Ch5, The.” Mark Trail. Radio broadcast, February 22, 1952.“Episode 272.” Mark Trail. Radio broadcast, February 25, 1952.“Episode 273.” Mark Trail. Radio broadcast, February 26, 1952.“Episode 274.” Mark Trail. Radio broadcast, February 27, 1952.“Episode 275.” Mark Trail. Radio broadcast, February 28, 1952.“Episode 276.” Mark Trail. Radio broadcast, February 29, 1952.“Episode 277.” Mark Trail. Radio broadcast, March 3, 1952.“Mark & Scotty in hunt for criminals operating in the 'Lost Forest'.” Mark Trail. Radio broadcast, March 4, 1952.“Episode 279.” Mark Trail. Radio broadcast, March 5, 1952.“Episode 280.” Mark Trail. Radio broadcast, March 6, 1952.“Episode 281.” Mark Trail. Radio broadcast, March 7, 1952.“Mystery of Malabar Island - Ch1, The.” Mark Trail. Radio broadcast, March 10, 1952.“Mystery of Malabar Island - Ch2, The.” Mark Trail. Radio broadcast, March 11, 1952.“Mystery of Malabar Island - Ch3, The.” Mark Trail. Radio broadcast, March 12, 1952.“Mystery of Malabar Island - Ch4, The.” Mark Trail. Radio broadcast, March 13, 1952.“Mystery of Malabar Island - Ch5, The.” Mark Trail. Radio broadcast, March 14, 1952.“Episode 287.” Mark Trail. Radio broadcast, March 17, 1952.“Episode 288.” Mark Trail. Radio broadcast, March 18, 1952.“Episode 289.” Mark Trail. Radio broadcast, March 19, 1952.“Episode 290.” Mark Trail. Radio broadcast, March 20, 1952.“Episode 291.” Mark Trail. Radio broadcast, March 21, 1952.“Episode 292.” Mark Trail. Radio broadcast, March 24, 1952.“Episode 293.” Mark Trail. Radio broadcast, March 25, 1952.“Mark & his giant friend, Johnny Malotte lead hunt for rodents causing bubonic plague in Hidden Mesa.” Mark Trail. Radio broadcast, March 26, 1952.“Episode 295.” Mark Trail. Radio broadcast, March 27, 1952.“Episode 296.” Mark Trail. Radio broadcast, March 28, 1952.“Faced with an arrogant refusal to stop wanton destruction, faces death to save 'Lost Forest'.” Mark Trail. Radio broadcast, March 31, 1952.“Mark & a senior industrialist facing imminent death, are trapped by a great waterfall.” Mark Trail. Radio broadcast, April 1, 1952.“Episode 299.” Mark Trail. Radio broadcast, April 2, 1952.“Episode 300.” Mark Trail. Radio broadcast, April 3, 1952.
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