That's very interesting, would you happen to have any example videos of Hopkins in the show?
https://youtu.be/fs9Wyuub3jY
Once you develop an awareness of how SF screenplay writers do this, you can't unsee it.
Babylon 5 was particularly egregious, I was never a fan but I was puzzled that JMS had to do rely on it so heavily. It was like he created the character of Delenn just to be an exposition dumper and Mira Furlan faithfully did what was asked of her. Screenwriters also call this diegesis if the writer goes all the way and uses dialog to explicitly feed the narrative to the audience.
Linus and Lucy was recorded by the Vince Guaraldi Trio back in 1964.
They're all dead now, which is a shame.
But there's a brilliant modern recording, from 2016, that features the original drummer, Jerry Granelli: https://www.youtube.com/watch?v=OODA_K5hxyc
And it's definitely worth spending some time to give it a watch/listen. There's a lot more to that little tune than most people probably realize.
The genesis of Guaraldi's involvement was a 1963 documentary "A Boy Named Charlie Brown" which has nothing to do with the 1969 animated feature.
This was produced for TV but never aired, and recently surfaced on Youtube: https://youtu.be/UGAs5fZUvBM&t=425s
To complicate things further, Guaraldi released "Jazz Impressions of A Boy Named Charlie Brown" (once again, based on the 1963 documentary) but these recordings are not the same as the cues used in the documentary.