Arnold Zenker Arnold Zenker Associates in Boston, which trains "people to successfully master the public spotlight." Arnold Zenker Arnold L. Zenker (born 1938) is a retired media broadcaster and public appearance counselor who gained brief stardom by sitting in for Walter Cronkite on the "CBS Evening News" in 1967. Zenker studied at the University of Pennsylvania in Philadelphia, from which he received an undergraduate and a law degree. In 1967 at the age of 28, he was asked to sit in for anchor Walter Cronkite to deliver the nightly news. Zenker, working as a Manager of News Programming at CBS at the
Walter Cronkite 2006. Cronkite's voiceover was notably not used on introducing the broadcast reporting his funeral – no voiceover was used on this occasion. Cronkite made a cameo appearance on a 1974 episode of "The Mary Tyler Moore Show", in which he met with Lou Grant in his office. Ted Baxter, who at first tried to convince Cronkite that he (Baxter) was as good a newsman as Eric Sevareid, pleaded with Cronkite to hire him for the network news, at least to give sport scores, and gave an example: "The North Stars 3, the Kings Oh!" Cronkite turned to Grant and said,