Purgatory (807)

[GateWorld]

ARROW - SEASON EIGHT
PURGATORY
EPISODE NUMBER - 807

A.R.G.U.S. brings Team Arrow to Lian Yu to build a weapon that will be needed for the coming crisis -- but their plans are disrupted by a string of familiar faces after Dinah, Roy, and Rene's plane is shot down.

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[Mrja84]

A very cool episode, I was thrilled to see so many faces from the first season return. Though there are others I hoped to have seen, but they weren't there.

I guess they just kinda hand-waved the reasoning why these characters, and the facelsss soldiers, returned it was a great way to cap off Oliver's journey and address some of Mia's lingering feelings of abandonment.