It is actually fairly realistic

I saw some people (audience of this show) complaining that the plot is totally unrealistic even for a TV show which often go over and under the reality, but I kind of feel some parts are pretty realistic. It's not uncommon to see people from totally different background -- came from different countries -- to work on something together.

By the way, I just realized the season finale is coming up soon. I don't think 2 more episodes are sufficient to cover each character's side-story. But we'll see.