Ok so I was definitely wrong about the Joranumites (but I thought it was a good shot), but I have a thought and am wondering if anyone else is thinking the same.....could they be pushing to make Gaal a 'mentalic'(i think that is how the books referenced them) aka a 2nd Foundationer.
She had a weird feeling about the star bridge and there was that comment but the emperor's spy(I'm pretty sure it was him that said it) that she should figure out what she is before it's used against her. She also had a sense that something was wrong at the end of episode 2.
Just a thought. Also loved Rayche's knives!!!
I doubt Hari staged the starbridge attack, that is way out of character. I think the intro states "some call him a murderer". Yes, the Emperor thought of trying to pin the blame on Seldon. A convenient scapegoat.