First season episodes incorporated an ad for Winston Cigarettes into the opening credits (this version of the opening was removed for syndication). Due to the decision to use a standard opening and closing for syndicated versions of the episodes, numerous episodes have incorrect closing credits. Sixth & last season episode debuted with, No Biz Like Show Biz (1965) dropped the "Meet the Flintstones" closing credit song, in favor of footage of Pebbles and Bamm-Bamm singing "Let the Sunshine In." (a reminder of Fred Flintstone's dream, earlier in the musical program).
At the end of the credits Fred Flintstone says Wilma