He also made appearances as a doctor on "All My Children". In 1962, Kemmer was cast as the historical investigative journalist Henry Morton Stanley in the episode, "The Truth Teller," on the syndicated television Anthology series, "Death Valley Days", hosted by Stanley Andrews. The episode is a study of the Medicine Lodge Indian Peace Treaty. Stanley arrives at Fort Larned, Kansas, to assess Hancock's effort to avoid war on the frontier. Charles Carlson filled the role of Wild Bill Hickok, long after Guy Madison played Hickock in a weekly syndicated series. Kemmer was twice married and had three children, Jonathan, Todd, and Kimberly. On November 5, 2004, Kemmer had a stroke in New York City; he died four days later.