All available episodes from 1975. CBS Radio Mystery Theater was a noteworthy attempt to revive in American radio dramas like Inner Sanctum (1941-1952) and Suspense (1942-1962). Radio dramas were widely considered "dead" 12 years prior to this series. CBS Radio Mystery Theater, or simply Mystery Theater, was created by Inner Sanctum creator Himan Brown and ran on CBS from 1974-1982. The show, much like older radio dramas, was introduced by a host (in this case E.G. Marshall), who steers us through the creaking door to start the episode. Many voices from the golden age of radio were featured, including Richard Widmark, Bret Morrison and Agnes Moorehead.-  Audio Credit: The Old Time Radio Researchers Group.

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CBS Radio Mystery Theater - Broadcast & Reception

• Aired every night at midnight in most markets, creating a "late-night spooky radio" vibe.
• One of the last successful network radio drama series before the format faded.
• Gained a cult following and is still beloved by old-time radio (OTR) fans today.     

Hosts & Narration

• E.G. Marshall (1974–1982, primary host) – Known for his deep, authoritative voice, setting a chilling tone.
• Tammy Grimes (1974–1977, occasional alternate host) – Provided a more whimsical, sometimes eerie presence.
• The host would introduce each episode with a dramatic monologue, often breaking the fourth wall to engage listeners.