PBS Eons, a YouTube channel about Deep Time and evolution that I follow, is now doing a series with PBS proper about "Life and Death in Pangaea". It about life during the Permian Period up to and including the mass extinction, the largest in the world's history to date, that ended it (sometimes called "The Great Dying"). First two episodes are good. The first covers some key developments in evolution in the late Carboniferous Period that shaped the life of the Permian. The second looks at the pelycosaurs, the dominant land vertebrates of the first part of the Permian, including the famed Dimetrodon (no, it's not a dinosaur in spite of an old misconception). An interesting thing is that these beasts were synapsids, the group that includes modern mammals like us. The sauropsids, which includes modern birds and reptiles as well as the dinosaurs, did not really come to prominence until after The Great Dying.
This is the first episode, available on the PBS Eons YouTube channel:
And the full series will be on this page on the PBS website. 1 & 2 are up, remainder will be released weekly through August. Americans can get it on the PBS app, too, I believe.


