I was scratching my head over this one myself. Traditio is seldom reliable anyway. They exaggerate their reporting so much that it becomes mere propaganda. In any current events piece of reportage, the best a Traditio commentary will do is tell you that a story happened. You'll want to verify the details from another source. But that being said, a recommendation to watch Cosmos from a Traditional Catholic is still truly baffling.
I'll admit I read the Cosmos book myself when I was a boy of 12. I still have it, as a matter of fact. It was a mercy of God that I read it, for it helped to lift me out of a deep, deep depression I was in at the time. It reignited my love for natural science and gave me many fascinating puzzles to think about. Carl Sagan, despite his many mistakes, was one of the best science writers of the twentieth century. I read many more of his books when I was a teenager.
But that qualifies as one of those instances where God directs a soul by His mysterious providence, not where He marks out a path that can be recommended to others. This all occurred long before I converted to Catholicism. As a Catholic I would not advise someone in my spiritual care to read Cosmos unless I were to personally guide them through it and guard them against the many subtle and not-so-subtle philosophical errors contained therein.
It's too bad there aren't any contemporary Catholic science writers of comparable quality. This is one defect that Thomist scholars with a scientific interest should work to remedy at once.