 Some new features were added such as "Fun with Science" or "Professor Wonderful" (with scientist Julius Sumner Miller) and "Marvelous Marvin" in the 1964–1965 season; Jimmie Dodd appeared in several of these new segments before his death in November 1964.Many markets stretched the program back to an hour's daily run time during the 1960s rerun cycle by adding locally produced and hosted portions involving educational subjects and live audience participation of local children, in a manner not unlike "Romper Room".In response to an upsurge in demand from baby boomers entering adulthood, the show again went into syndicated reruns from January 20, 1975, until January 14, 1977.