By the end of 1954 the national news broadcast was expanded to 15 minutes, twice a day, with film and still pictures accompanying Henderson's narration.
He subsequently travelled through Europe for three years sending recordings for his Headliners program back to Canada as well as hosting a CBC show, Passport to Adventure.
In 1954, he returned to Canada to accept a position at CBC Television as its newsreader in hopes of becoming the country's answer to Edward R. Murrow.
He left after several years to lecture and write books on international affairs and ran the Larry Henderson School of Television in Toronto.
In the 1970s, Henderson joined the Canadian International Development Agency going on assignment to Tanzania where he helped organize the country's national broadcasting system.