The doctrine was articulated for radio and extends to television; its birthplace medium is recorded here.
Source BBC Official Site
Source Queen for a Day (Wikipedia)
Source Wikipedia: Quiet, Please
Source Wikipedia: Round Britain Quiz
Source Round the Horne, Wikipedia
Source Wikipedia: Challenge of the Yukon
Source Sky King, Wikipedia
Source Suspense (radio drama) (Wikipedia)
Source Take It from Here (Wikipedia)
Source Wikipedia: Test Match Special
Source Wikipedia: Texaco Star Theater
Source The Adventures of Sam Spade (Wikipedia)
Source The Adventures of Superman (radio series) (Wikipedia)
Source The Aldrich Family (Wikipedia, with Wikidata Q7713063)
Source Wikipedia: The Archers
Source The Bell Telephone Hour (Wikipedia)
Source The Bickersons (Wikipedia)
Source Burns and Allen (Wikipedia)
Source The Chase and Sanborn Hour, Wikipedia
Source Wikipedia: The Cinnamon Bear
Source The Cisco Kid, Wikipedia
Source Wikipedia: The Falcon (radio series)
Source The Goon Show (Wikipedia)
Source The Great Gildersleeve (Wikipedia)
Source Green Hornet (Wikipedia)
Source Guiding Light, Wikipedia
Source The Hitchhiker's Guide to the Galaxy (radio series) (Wikipedia)
Source The Jack Benny Program (Wikipedia)
Source The Mercury Theatre on the Air (Wikipedia)
Source The Navy Lark (Wikipedia)
Source Encyclopedia Britannica
Source Wikipedia: The Whistler (radio series)
Source This American Life (Wikipedia)
Source Encyclopedia Britannica
Source Truth or Consequences - Wikipedia
Source Voice of America (Wikipedia)
Source Wikipedia: Woman's Hour
Source Wikipedia: X Minus One
Source You Bet Your Life (Wikipedia)
Source Yours Truly, Johnny Dollar (Wikipedia)
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