Jared Harris as Hari Seldon

God this board is dead. So far after seven episodes Harry Seldom is a recurring character. He's probably in it as much as any other character so far though no single character dominates as the "action" is spread around between the various players.

He is in it maybe 1/3 as much as the main characters, maybe less. Every scene he is in is brilliant though, just like Terror and Chernobyl.

I don't like his Hari Seldon, but he is great in "The Expanse" as Anderson Dawes ... but upstaged by David Strathairn as Klaes Ashford.

He is not in every episode, and the ones he is in he is a sort of bit part player - but an important one.