dickvandyke Beard for a gumshoe? "Mary Poppins" and "Mary Poppins Returns" actor "Diagnosis: Murder" star whose self-titled 1961-1966 sitcom won 15 Emmy Awards: 3 wds Eponymous star of a 1960s sitcom, the only American TV star with his three initials "The ___ Show," best TV comedy series: 1962-65 Caractacus Potts portrayer on film