CBS Radio Mystery Theater

CBS Radio Mystery Theater (a.k.a. Radio Mystery Theater and Mystery Theater, sometimes abbreviated as CBSRMT) is a radio drama series created by Himan Brown that was broadcast on CBS Radio Network affiliates from 1974 to 1982, and later in the early 2000s was repeated by the NPR satellite feed.
The format was similar to that of classic old time radio shows like "The Mysterious Traveler" and "The Whistler", in that the episodes were introduced by host E. G. Marshall who provided pithy wisdom and commentary throughout. Unlike the hosts of those earlier programs, Marshall is fully mortal, merely someone whose heightened insight and erudition plunge the listener into the world of the macabre.
As with Himan Brown's prior "Inner Sanctum Mysteries", each episode of "CBS Radio Mystery Theater" opened and closed with the ominous sound of a creaking door. This sound effect is accompanied by Marshall's greeting, "Come in!… Welcome. I'm E. G. Marshall." At each show's conclusion, the door swings shut, and Marshall signs off with: "Until next time, pleasant… dreams?" This is followed by an extended variation of the show's theme music.
"CBSRMT" was broadcast each weeknight, at first with a new program each night. Later in the run, three or four episodes were new originals each week, and the remainder repeats. There were 1,399 original episodes. The total number of broadcasts, including repeats, was 2,969. Each episode was allotted a full hour of airtime, but after commercials and newscasts, each episode typically ran for around 45 minutes. 
Hosts.
E. G. Marshall hosted the program from January 1974 until February 1, 1982, when actress Tammy Grimes took over for the series' final season, maintaining the format. Himan Brown re-recorded E.G. Marshall's original host segments for NPR's broadcast of the show in the 2000s.
Music.
The series' theme music features three descending notes from double basses, a stopped horn sting and timpani roll, then a low, eerie theme played by the bass clarinet. The opening and closing themes for "CBSRMT" are excerpted from the music from the score for "Twilight Zone" episode "Two", composed by Nathan Van Cleave. Series listeners will immediately recognize the "RMT Theme" beginning about 1:35 on the "Two" soundtrack selection from the "Twilight Zone" CD boxed set. Other background tracks from the "Twilight Zone" music library, to which CBS owned full rights, were featured repeatedly in episodes of "CBSRMT". The theme song and the other music was also previously used in the 1950s and 1960s in other CBS-owned radio and television dramas ("Perry Mason"; "Rawhide"; "The Fugitive"; "Gunsmoke"; "Have Gun Will Travel"; "Suspense"; "Yours Truly, Johnny Dollar"; etc.), in addition to "Twilight Zone", as it was all owned by CBS.
Scope.
Despite the show's title, Brown expanded its scope beyond mysteries to include horror, science fiction, historical drama, westerns and comedy, along with seasonal dramas at Christmas: "A Christmas Carol", starring host Marshall as Scrooge, aired every Christmas Eve except 1974 and 1982.
In addition to original stories, there were adaptations of classic tales by such writers as O. Henry, Ambrose Bierce, Algernon Blackwood, Wilkie Collins, Arthur Conan Doyle, Charles Dickens, H. Rider Haggard, Henry James, Guy de Maupassant, Edith Wharton, Oscar Wilde and others. Brown typically devoted the first full week of each January to a five- or seven-part series on a common theme. These included a full week of stories by an American writer, (Edgar Allan Poe in 1975, Mark Twain in 1976); week-long adaptations of classic novels ("The Last Days of Pompeii" in 1980, "Les Miserables" in 1982); and original dramas about historical figures (Nefertiti in 1979, Alexander the Great in 1981). The works of Russian writers, including Gogol, Dostoevsky and Tolstoy, were also adapted.
Radio historian John Dunning argued the "CBSRMT" scripts varied widely in quality and concept. Many of the hour-long scripts were padded with filler, Dunning suggested, and could have been worked better as 30-minute programs, while other episodes suffered due to having been scripted by writers unfamiliar with the unique needs of radio drama.
Notable performers.
Prominent actors from the stage, radio, film and television performed on the series. Notable regulars included Mason Adams, Lloyd Battista, John Beal, Ralph Bell, Howard Da Silva, Keir Dullea, Patricia Elliot, Morgan Fairchild, Bernard Grant, Veleka Gray, Jack Grimes, Fred Gwynne, Marian Hailey, Larry Haines, Paul Hecht, Celeste Holm, Russell Horton, Kim Hunter, John Lithgow, Roberta Maxwell, Mercedes McCambridge, Kevin McCarthy, Arnold Moss, William Redfield, Tony Roberts, Norman Rose, Alexander Scourby, Marian Seldes, Kristoffer Tabori and Michael Tolan.
The series introduced a new generation of listeners to many of the great radio voices, including Joan Banks, Jackson Beck, Virginia Gregg, Victor Jory, Mandel Kramer, Marvin Miller, Dan Ocko, Santos Ortega, Alan Reed, Rosemary Rice, Anne Seymour, Arnold Stang, Les Tremayne, Lurene Tuttle and Janet Waldo.
A number of well-known veteran and future stars of stage, film and TV made appearances, including
At the beginning of the show's run, actors were paid union scale at around $73.92 per show. Writers earned a flat rate of $350 per show. Production took place with assembly-line precision. Brown met with actors at 9:00 a.m. for the first script reading. After he assigned roles, recording began. By noon, the recording of the actors was complete, and Brown handed everyone checks. The program was taped at the CBS Studio Building, 49 East 52nd Street in Studio G, formerly Studio 27 (renamed in honor of Arthur Godfrey whose programs originated in the building for decades).
Episodes.
Below are lists of episodes for each of the nine seasons of CBS Radio Mystery Theater.
Awards.
In 1974, "CBSRMT" won a Peabody Award, and in 1990 it was inducted into the National Radio Hall of Fame. On May 6, 1979, Himan Brown was presented a Broadcast Preceptor Award by San Francisco State University for his contributions with the "CBSRMT".
Continuing popularity.
From June 3 to November 27, 1998, "CBSRMT" was rebroadcast over CBS radio affiliates and, in 2000, on some NPR stations, in both cases, Himan Brown re-recorded the original introduction and narrations of E.G. Marshall and Tammy Grimes.
"CBSRMT" remains popular with collectors, with numerous websites, discussion forums and a Usenet newsgroup devoted to trading MP3 files of episodes. Many episodes are available for listening on YouTube. Many of these episodes were recorded with original network and local news and commercials embedded, providing an interesting insight into the period when the program was originally broadcast. 
Related publications.
The episode "Children of Death", broadcast February 5, 1976, written by Sam Dann, served as the basis for Dann's 1979 novel "The Third Body", published by Popular Library. Another of his stories for "Mystery Theater", "Goodbye Karl Erich" from the 1975 season, was also turned into a novel by the same name, first published in 1985.
In 1976, a paperback anthology with three short stories adapted from the series' radio scripts was published by Pocket Library, "Strange Tales from the CBS Radio Mystery Theater", edited and with a foreword by Himan Brown.
In January 1999, McFarland & Company, Inc. published "The CBS Radio Mystery Theater". The book, by Gordon Payton and Martin Grams, Jr., includes a brief history of the program and an episode guide.
In October 2006, Michael Anthony Stahl published "The CBS Radio Mystery Theater As An Educational Degree".