I think large chunks of tonight's episode were drawn from Sagan and Druyan' s Comet.
Well, that would explain it. I thought the focus was a little narrow for a Cosmos episode -- although a "narrow" focus on the foundations of modern astrophysics is not that narrow, admittedly.
Even the line about Halley becoming Newton's psychotherapist is in Comet. (I reread the third chapter, "Halley," this morning while eating breakfast.)
I wish, though, that we'd get an episode or two about scientists from somewhere other than Europe.
Perhaps we will, eventually.
It was nice to see a bit of live-action dramatization and more use of real-world settings like the coffee house, Cambridge, and the Champ de Mars. But I'm not fond of it when they do dialogue scenes in the animated sequences. Not only is the animation style not very expressive (so the "acting" is weak), but actually fictionalizing conversations when discussing real history in a documentary seems inappropriate.
Halley's dialogue was far too modern, but I don't know that I agree that it's entirely inappropriate to fictionalize a conversation in a documentary. If Cosmos were intended for a serious, scholarly audience, then, yes, I could agree. But it's clearly intended for a broader, pop audience, and if fictionalized dialogue helps the material reach that pop audience (whose expectations would be different than, say, members of the Royal Society) then I think it's justified.
And I'm not sure that galactic collision three billion years from now would be as harmless to life as Tyson said. There'd be few star collisions, true, but galaxies are made up of gas and dust too, and the collisions of gas clouds would trigger massive bursts of star formation and supernovae, which would be hazardous to life. Dense gas or dust clouds engulfing star systems can also potentially be devastating to life on their planets.
I wished Tyson had mentioned that humanity will be long extinct -- and no doubt long forgotten -- and the Earth uninhabitable by the time of the Milky Way/M-31 collision.
I've said it before, and I'll say it again. It honestly depresses me that I won't be alive to witness the approach of Andromeda and to see the collision over the span of a billion years. I bet it will be spectacular, the dance of the two spirals.