Leaving military service in 1946, Kirchner was hired as a DJ and announcer at Chicago's AM station
WIND. He subsequently transferred to
NBC as the announcer and participant on the network's daytime talk program
The Bob & Kay Show, served as the announcer on the radio and television game show,
Ladies Be Seated, which was carried on
American Broadcasting Company until July 1950 and, with his wife, Ruth Ross, hosted another ABC daytime show ''Housewive's Holiday''. He gained national fame, however, as a result of his central role as the
ringmaster and announcer on the popular hour-long Sunday afternoon children's program
Super Circus, originating from
WBKB-TV and seen on ABC from 1949 until 1956. The show's renown was greatly enhanced by his co-host, baton-twirling
drum majorette-
bandleader Mary Hartline. They were both featured on the cover of the August 21, 1953 issue of
TV Guide Magazine. In June 1955, ice-skating
Jinx the chimpanzee was added as a regular participant. On December 18, a month after
Super Circus moved from Chicago to New York City, Kirchner left the show and started a new ringmaster career at the city's TV station
WOR-TV Channel 9. The new show —
Terrytoon Circus — premiered on October 22, 1956, and was seen Monday through Friday at 7 pm. Most of the daily episodes opened with Kirchner's hand puppet, Clownie, breaking through a paper hoop and announcing the host as either "CK", "Skinny Bones" or "High Pockets". Circus music would be heard, followed by Kirchner walking out, wearing a circus ringmaster's uniform and intoning, "Ladies and gentlemen and children of ohhhhhhhhhhhhh...all ages... welcome to
Terrytoon Circus." He would perform brief cross-talking routines with Clownie and introduce Terrytoons as well as other cartoons. From May to September 1957 on channel 9, while continuing to host
Terrytoon Circus, Kirchner hosted an afternoon children's series,
The Scrub Club, which presented him as the leader of a children's clubhouse. Starting in September 1959, Kirchner was seen seven days a week since, in addition to continuing with
Terrytoon Circus, he took on the hosting duties of a Saturday and Sunday movie series,
Super Adventure Theater, which showcased theatrical films from the 1930s, 1940s and 1950s that were considered to be appropriate for viewing by children and adolescents. In 1962,
Terrytoon Circus was advised that it no longer had permission to use the copyrighted name "Terrytoon" and, as of April 30, it was introduced under the new name "Merrytoon Circus". Also, for five and-a-half months in 1962–63, from September 22 until March 6, Kirchner took on still additional duties as a nationally seen Saturday morning personality when NBC hired him in his familiar and continuing guise as a ringmaster for the 11:30–noon children's circus series
Marx Magic Midway. Six months after the cancelation of
Marx Magic Midway, on September 20, 1963,
Merrytoon Circus also came to an end.
Super Adventure Theater continued on weekends for another four years until it too was canceled in 1967. A year later, on August 26, 1968, Channel 9 premiered a daily afternoon revival of
The Scrub Club, but it lasted only three-and-a-half months, closing on December 13. Six weeks later, Kirchner was given his final children's show assignment, once again as the ringmaster as well as the announcer and co-host, of channel 9's ''
Bozo the World's Most Famous Clown'' show. His first appearance was on February 3, 1969, with the assignment ending a year later, on January 30, 1970. ==Later years and death==