https://www.metv.com/stories/buddy-ebsen-wrote-thank-you-letters-to-critics-who-had-panned-barnaby-jones

Ebsen had his own misgivings about Barnaby Jones.

Apparently Buddy Ebsen was a bundle of energy on the set of Barnaby Jones (https://www.metv.com/stories/apparently-buddy-ebsen-was-a-bundle-of-energy-on-the-set-of-barnaby-jones)

Ebsen was more than just a foxy grandpa.