ocr: The event happened at the heughtafradio's pre-teleyision antluence. Mercurr Theatre aired at Spm Suday nights, compeung against tha nuch-loved ventriloquist Edgar Bergen and his dummy sidekick, Charlie Mccarthy, Wellas neadedto excite and draw an andience. Hedreamed up the Martian invasion radio play: and bired Howard Koch Eu write the one-hour script. They transferred the scene: of the uvasion, originally Euglaud, ro New Jersey,