In 1978, Kukla, Burr and Ollie joined the Broadway cast of "Side by Side by Sondheim," a revue of Stephen Sondheim songs. A high point was Burr sitting on the edge of the stage, holding Kukla as he sang "Little Lamb."  A song Sondheim wrote especially for KFO in the 50s, "The Two of You," was added to the show when Burr joined the cast.