Hmm. I don't want to make the case entirely involved with Nick's past, but maybe a small detail near the end that ties it all together could work, kinda like the lead to DL-6 in 1-2. And then that could pique Apollo's interest and maybe get him nosy. It could lead to some awkwardness that distances them leading to either one of them hunting down the other, or both at the same time.

If they haven't established any sort of relationship by then, maybe something like a trip could seal the deal? Winding down from a case and such and finally letting loose.

And it's all good! I expect to run into a lot of slowness later this week since I have exams coming up.