alt Hacker NewsSagan made solid contributions to Planetary Science in the 60's and 70's.
His role as PBS educator, SF author, etc. needs to be considered as a separate thing.
I also loved James Burke and his Connections series, but as it got into the later seasons the so-called "connections" got tenuous and sometimes quite strained.
You can go through all the classic PBS science shows and find problems, Stephen Hawking's Universe was basically unwatchable because they refused to engage with the math.
People like Sagan have a worldview in which we are all either rational robots that only believe in "science", or else silly magic-believers that can't think by themselves. Of course Sagan himself proves that this is wrong: you can be a great scientist while believing a lot of silly nonsense about the ancient world, and about crab evolution apparently.