Sticking with your one-word titles, I would suggest “call” or “calling” for episode one, given both Cassian’s search for his sister, Syril’s sense of duty and the literal call leading both Luthen and the Morlana security dispatch to Ferrix.
For part two I would suggest “Struggle”.
What about movies one and two? For one I’d go ‘Fugitive’ but he’s not quite that. A few characters have something they desperately want in this one, but I can’t think of a word for that.
Maybe “Longing” could convey that.
These things aside, can I get a link, please?