I wanted to submit this due to Don Herbert's death at the age of 89, but there were no embedded video. So, I thought I would use Sift Talk for this even I won't get any votes:

"In his four-part (each part is posted separately; 2 hours total) oral history interview, host Don Herbert describes his early years as an actor on stage and radio before turning to television where he created the classic children’s science series "Watch Mr. Wizard". He details his hosting of the show, as well as working with his young assistants. He talked about his simultaneous work as "G.E. Theatre’s" “progress reporter,” hosting a different three-minute commercial segment for each episode through the majority of run. He talks about the later incarnations of the “Mr. Wizard” franchise. He also mentions his appearances on morning and late-night television talk shows."

Parts: 1
2
3
4.