 During the run of this series, Allen also introduced Albert Brooks and Steve Martin to national audiences for the first time.Allen returned to guest host "The Tonight Show" for a single 1971 episode, and then became a semi-occasional guest host (15 episodes) from 1973 to 1977.A syndicated version of "I've Got A Secret" hosted by Allen and featuring panelists Pat Carroll and Richard Dawson was taped in Hollywood and aired during the 1972–1973 season.