TL;DR – This season has started to diverge considerably from the source material, and among its bombast and stunning visuals are some creeping worries.
Disclosure – I paid for the Apple TV+ service to view this episode.

Foundation Introduction –
When I first started watching the third season of Foundation with A Song for the End of Everything, I was concerned they would be trying to force all of The Mule’s story into this one season. While they avoided that particular pitfall, the season still shows signs of strain as it pushes further from Asimov’s framework, as you can start to feel the show beginning to wobble a bit and potentially head towards disaster as we move farther away from the source material.
So, to set the scene, it has been 152 years since the Second Crisis, and while the Empire continues to collapse, the Foundation grows, expanding further out of the outer reach. Now both the Empire and The Foundation are fighting to control Kalgan, a pleasure planet, and the key to controlling The Middle Band. But there may be a third player out there, ready to tear everything up. For after much prediction, or perhaps, not enough prediction, The Mule (Pilou Asbæk) is on the move, and both sides should fear him because with him comes calamity, and the galaxy is not prepared for what he is about to wreak. Now, from here, we will be looking at the season as a whole, so there will be some [SPOILERS] ahead.