Are those historical portrayal 100% or mostly real?

A great deep view with simple way into our discoveries & inventions so far. In this series Neil deGrasse Tyson explained many things about time and space. And sometimes they show animated presentations of historical characters like Newton or Willian Herschel etc. They showed some events too through animated representations.

Question is : are those real events? or imagination to simply present things?

In S01E04 Neil deGrasse Tyson said

Back in 1802, on a night like this,

the astronomer William Herschel strolled the beach

on the English coast, with his son John.

In S01E05 an animated presentation showed that Newton was discovering something using light and got distracted and didn't experimented on it ever.

(knocking on door, door opens)

Begging your pardon, Master Newton,

the cook frets that your dinner will spoil, sir.

DEGRASSE TYSON: No, Isaac, don't< put the magnifying glass down!

Something even more amazing is hidden in the light

a code, a key to the cosmos.

Isaac Newton didn't miss much, but that one was a beauty.

He just walked right past the door to a hidden universe;

a door that would not swing open again for another 150 years.

So after watching these 2 segments it came to my mind that there are more animated incidents that are shown in this series. Which either portray a conversation between 2 or may be some incident that led to a discovery.

How accurate are they? I mean Newton didn't wrote "I was doing something, suddenly butler knocked ....... " etc. right!!

Does anyone know are these presentation/event/conversations of historical characters all imagination or real or real to which extent?