Kinoy and George Lefferts as well as their adaptations of new works by the likes of A. A. Phelps Jr., Alan Nourse, Algis Budrys, Arthur Sellings, Clifford Simak, Donald A. Wollheim, Evelyn Smith, F. L. Wallace, Finn O’Donovan, Fletcher Pratt, Frank M. Robinson, Frank Quattrochi, Frederic Brown, Frederick Pohl, Fritz Leiber, Gordon R. Dickson, Graham Doar, H. Beam Piper, H. L. Gold, Isaac Asimov, J. T. McIntosh, Jack McKenty, James Blish, James E. Gunn, James E. Gunn, James H. Schmitz, Katherine MacLean, L. Sprague de Camp, Mark Clifton, Milton Lesser, Murray Leinster, Ned Lang, Peter Phillips, Phillip K. Dick, Poul Anderson, Ray Bradbury, Richard Maples, Richard Wilson, Robert Bloch, Robert Heinlein, Robert Sheckley, Robert Silverberg, Ross Rockland, Stephen Arr, Stephen Vincent Benet, Steven Tall, Theodore sturgeon, Tom Goodwin, Vaughn Shelton, William Tenn, and Wyman Guin.
Ultimately the series ran for 124 episodes (plus the audition). Its last episode aired 9 January, 1958. Almost all episodes have been preserved and most can be listened to here. They also appear on CDs and Audio DVDs, which can sometimes be found at Amoeba. NB: the ongoing popularity of X Minus One has led to some unscrupulous folks splicing together various previously existing material from different sources to create “newly discovered” episodes. Special thanks to the folks at the Digital Deli Too for their hard work in the name of preserving OTR. Consult with them before splurging.