The Junior Morning Show

The Junior Morning Show was a children's show, featuring youngsters, in Washington, D.C. Jim Henson got his start in television on this show from 1954 to 1973 along with Sam and Friends. The show premiered on June 19, 1954 to December 29, 1973
According to Jim Henson's Designs and Doodles: "One afternoon in his senior year of high school, two production assistants from local station WTOP visited [Henson's] high school puppetry club. The station manager had sent them to find puppeteers for a Saturday morning children's program, called The Junior Morning Show. Jim jumped at the opportunity... [The show] only aired for three weeks, but out of the experience Jim got a favorable mention in a local newspaper and a chance to work in front of a television camera.
Pierre the French Rat, a character Henson used for a comic in his high school comic strip in 1971-72, appeared in puppet form on this show.
The show was cancelled in December 29, 1973