Green Acres - Season 5 - Eps 23: The Beeping Rock
A wild story told by an 11-year-old about his recent trip to the moon enthralls Eb and Lisa. Oliver believes none of it, especially when the kid sells Lisa a "moon rock" for $14. But once the rock starts beeping under the moonlight (and when Arnold snorts at it), he suspects he's the subject of a practical joke. Oliver ships it off to NASA for their scientists to examine.
About Green Acres

Title: Green Acres
First Air Date: 1965-09-15
Last Air Date: 1971-04-27
Status: Ended
Rating: 7.3/10 (from 65 votes)
Language: EN
Seasons: 6
Total Episodes: 170
Network: CBS
Genres: Comedy
Production Companies: Filmways Television, Orion Television, MGM Television, Filmways Pictures
Synopsis
Green Acres is an American sitcom starring Eddie Albert and Eva Gabor as a couple who move from New York City to a rural country farm. Produced by Filmways as a sister show to Petticoat Junction, the series was first broadcast on CBS, from September 15, 1965 to April 27, 1971. Receiving solid ratings during its six-year run, Green Acres was cancelled in 1971 as part of the "rural purge" by CBS. The sitcom has been in syndication and is available in DVD and VHS releases. In 1997, the two-part episode "A Star Named Arnold is Born" was ranked #59 on TV Guide's 100 Greatest Episodes of All Time.
Cast

Eddie Albert
Oliver Wendell Douglas

Eva Gabor
Lisa Douglas

Pat Buttram

Tom Lester

Alvy Moore

Frank Cady