By 1955, Ketcham moved from his Carmel cottage to upper Carmel Valley, where he purchased the former Fred Wolferman ranch, only 40 minutes from the Monterey Peninsula. The Spanish adobe home on the Carmel Valley property was designed by architect Hugh W. Comstock with bitudobe brick. On the edge of the orchard was a Victorian ranch house for the foreman and his family, designed by architect Wilson Mizner. In 1958, Dennis Play Products, Inc., was created by Ketcham to distribute toys, which included the Dennis the Menace Doll, Ruff Dog, and Banshee Ball. In 1959 a CBS television sitcom called Dennis the Menace (1959 TV series) was released, based on the Ketcham comic strip Dennis the Menace. The show was a great success. In 1970 King Features Syndicate revived Ketcham's wartime strip Half Hitch as a newspaper comic. The strip was published under Ketcham's name, although it was drawn and written by others. The new version of Half Hitch ran until 1975. Family Ketcham's first wife, Alice Louise Mahar Ketcham, died Monday, June 22, 1959 of a brain hemorrhage. The real-life Dennis was 12 when his mother died. Hank and Alice were separated at the time of her death. Three weeks later, Ketcham married for a second time to his secretary, Jo Anne Stevens, and moved with Dennis and her to Geneva, Switzerland, where he lived from 1960 to 1977, while still producing Dennis the Menace. Dennis had difficulty with his schooling, though, so was sent to boarding school in Connecticut, while Mr. Ketcham and his second wife remained in Switzerland. This marriage ended in divorce in 1968. In 1977, Ketcham moved back to the United States and settled in Monterey, California, with his third wife, the former Rolande Praepost, whom he had married in 1969, and with whom he had two children, Scott and Dania. Dennis Ketcham served in Vietnam, suffered post-traumatic stress disorder and had little contact with his father. Ketcham and his son were estranged for much of Dennis's adult life. Later life and retirement When his Dennis the Menace cartoon added a Sunday strip, Ketcham hired artist Al Wiseman and writer Fred Toole to produce the Sunday strips and the many Dennis the Menace comic books that were published. People from around the country sent captions to him, and he would find one that he liked and illustrate the gag. In 1990, Ketcham published a memoir