Fred's mother-in-law writes a letter saying that she is staying with her favorite son-in-law and his wife, and would be coming to seeing them next week. Fred then attempts to fix up an old house for his mother-in-law and move it into his backyard.
Cast Appearances

Alan Reed
voices Fred Flintstone
Don Messick
voices Bamm-Bamm Rubble
Jean Vander Pyl
voices Wilma Flintstone
Mel Blanc
voices Barney Rubble
Gerry Johnson
voices Betty RubbleEpisode Discussion
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