Complex sentence: When promoting his 1949 memoir "To Hell and Back", he appeared in the radio version of "This Is Your Life", and to promote the 1955 movie of the same name, he appeared on Ed Sullivan's "Toast of the Town".
Split into simpler sentences: When promoting his 1949 book "To Hell and Back", he appeared on the radio version of "This Is Your Life". To promote the 1955 film of the same name, he appeared on Ed Sullivan's "Toast of the Town".