Henning made many TV appearances from the 1960s through the 1980s on a variety of programs, including "The Ed Sullivan Show", "Adam-12", "Happy Days", "Mork & Mindy", "The Facts of Life" and "The Tonight Show". She provided the voice of Jethrine Bodine in "The Beverly Hillbillies". She made dramatic appearances in "Hunter" and "Capitol" and in "Sliders" as Mrs. Mallory. Her many game show appearances include "Family Feud", "Match Game", "Hollywood Squares", "The Perfect Match", "Three for the Money", "Password", "Tattletales", "Showoffs", "Password Plus" and "Body Language". She was a substitute hostess on the 1974–1976 daytime edition of "High Rollers".