It’s a journey that Outlander showrunner Ronald D. Moore has been excited about since the season began and it’s a journey that Ian will play a pivotal role in.
As noted prior, Ian is kind-of a big deal in the Outlander universe.
More brief spoilers from the books in this paragraph.
Coming up, he should be the catalyst for why Claire and Jamie go on the long journey that will take them away from Scotland and to other locales across the world.