Our final installment in our Super Summer bonus series is super-sized with the last seven chapters of this epic Superman adventure! Will Superman recover his memory? Will "Big" George Latimer get his revenge on the Man of Steel? And how will Clark Kent explain his mysterious absence from the newsroom? Find out in the concluding installments of "Superman vs. Kryptonite," originally aired on Mutual between June 18 and June 27, 1947.

We're visiting some of the world's biggest and busiest cities this summer, and while we're in town we'll rub elbows with some of their resident sleuths. Our series kicks off with the Big Apple and three radio mysteries set on the streets of New York. Dick Powell suspects there's more to the story of a Central Park hit and run case in Richard Diamond, Private Detective (originally aired on NBC on August 29, 1949); Danny Clover investigates "The Joan Fuller Murder Case" from Broadway is My Beat (originally aired on CBS on November 17, 1950); and as Captain Kennelly, Everett Sloane looks into an alleged case of self defense in 21st Precinct (originally aired on CBS on July 17, 1954).

As "Bud Smith," the amnesiac Superman is a home run-crushing, strike-out hurling baseball phenom! But "Big" George Latimer still hunts for the missing Man of Steel and the crew at the Daily Planet is looking for Clark Kent. This epic adventure continues with the next five chapters, originally aired on Mutual between June 11 and June 17, 1947.

Happy 4th of July and a happy 250th birthday to the USA! In honor of this momentous occasion, I'm sharing an encore presentation of four American history mysteries.

Henry Fonda recreates his role of Young Mr. Lincoln in a radio version of the classic film on Academy Award (originally aired on CBS on July 10, 1946). Honest Abe is a lawyer who must clear his wrongfully accused clients of murder. Lee Bowman plays Allan Pinkterton, one of America's most celebrated detectives, as he investigates a case of robbery and murder in "The Pinkerton Man" from The Cavalcade of America (originally aired on NBC on November 18, 1946). A recently released convict falls in with a gang that forges correspondence from historical figures in "Letters from Aaron Burr" from The Whistler (originally aired on CBS on November 20, 1949). And "the man with the action-packed expense account" hunts for a stolen original copy of the Gettysburg Address. Bob Bailey stars as Yours Truly, Johnny Dollar in "The Meek Memorial Matter" (AFRS rebroadcast from March 3, 1957).

As our epic adventure continues, Superman escaped from "Big" George Latimer, but his exposure to the kryptonite robbed him of his memory. Soon he trades his trademark cape and costume for a baseball uniform as a pitcher with an unbelievable arm in the next five chapters of the story that originally aired on Mutual between June 4 and June 10, 1947.

We wrap up our month of actors who played multiple detectives on the air with Bob Bailey. Bailey played wisecracking gumshoe George Valentine on Let George Do It before he stepped in as Johnny Dollar and made the role of "America's fabulous freelance insurance investigator" his own. We'll hear him as George in "Come and Get Me" (originally aired on Mutual on May 16, 1949) and "The Silent Waterfall" (originally aired on Mutual on January 9, 1950). Then, he's Johnny Dollar in the five part mystery "The Shady Lane Matter" (originally aired on CBS between July 9 and July 13, 1956).

The stakes are higher than ever for Superman as this epic adventure continues! "Big" George Latimer may have figured out how to use the Kryptonite to wipe out Superman once and for all, as Batman and Robin continue their desperate search for the Man of Steel. We'll hear every exciting minute in these five chapters that aired on Mutual between May 28 and June 3, 1947.

We continue our look at actors who played multiple gumshoes on the air with Gerald Mohr - who, for my money, gave us the definitive portrayal of Raymond Chandler's Philip Marlowe. But Mr. Mohr wasn't only Mr. Marlowe on the air. He also put in a four-episode stint as Archie Goodwin to Sydney Greenstreet's Nero Wolfe. We'll hear Mohr as Marlowe in three radio mysteries: "The Hard Way Out" (originally aired on CBS on November 28, 1948); "The Feminine Touch" (originally aired on CBS on May 7, 1949); and "The Dark Tunnel" (originally aired on CBS on August 18, 1950). Then he's Archie Goodwin in "The Case of the Phantom Fingers" (originally aired on NBC on January 26, 1951). Finally, we'll hear his audition as "the man with the action-packed expense account" - Johnny Dollar.