Could this be [Captain Z-Ro][1] from 1955?

> Scientist Captain Z-Ro, working in his remote laboratory, safeguarded
> mankind and history from impending harm. He had a time machine, the
> ZX-99, both to view history and to send someone back in time. Each
> week, he and his teenage assistant Jet would view an episode in time
> and inevitably see that some event was unfolding contrary to history
> (e.g., King John not signing the Magna Carta). Captain Z-Ro would then
> send Jet back in time to intervene and ensure that history played out
> as originally recorded.

https://www.youtube.com/watch?v=7wEaMHxjTQI


  [1]: https://en.wikipedia.org/wiki/Captain_Z-Ro