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Arnold Moss (January 28, 1910 – December 15, 1989) was an American character actor. Moss made two appearances in Bob Hope films, as Hope's Casablanca contact in the espionage spoof My Favorite Spy and as a conniving Venetian doge in Casanova's Big Night. Moss appeared in dozens of television programs during the golden age of TV. He appeared on television in Star Trek (1966) as mysterious actor Anton Karidian, alter-ego of the tyrannical Gov. Kodos of Tarsus IV, in the episode "The Conscience of the King". He also played in The Rifleman as the school teacher, Mr. Griswald, and as Chief Lonespear in Bonanza episode "In Defense of Honor" in 1968. Other television appearances include The Time Tunnel, The Girl From U.N.C.L.E., The Man From U.N.C.L.E., and the anthology series The Alfred Hitchcock Hour, General Electric Theater, Alfred Hitchcock Presents, Suspense, Tales of Tomorrow, Studio One, and Kraft Theater.