I'm thinking most of 518, but yeah, just that ep.
- Oliver shuts everything down at the end of 517
- Diggle has to rally up the noobs to get Oliver back in 518 while I'm guessing Felicity is off getting deeper into Helix [maybe she is pissed Oliver disbands the team, I don't know]. Team gets back together by the end of 518. Minus Felicity, maybe?
- Then 519 is Team Arrow vs. Team Felicity, which I'm wondering if it's not ultimately about getting Felicity back from her Helix downward spiral.
I figure the team-ness issues are over then, but the O/F issues remain, which is why they get trapped in a room in 520 until they solve them.