Panelist Joel Grey was starring in the Broadway box office hit 'Cabaret', at the Imperial Theatre (the show changed locations twice), since November 1966. The production would run for 1,165 performances, closing on September 06, 1969. The musical would be adapted into 'Cabaret (1972)', with Grey reprising the 'Emcee' role.
Peggy Cass had replaced Kay Medford in Woody Allen's Broadway comedy 'Don't Drink the Water', at the Morosco Theatre. This production ran for 598 performances and was eventually adapted into 'Don't Drink the Water (1969)' and 'Don't Drink the Water (1994)'.