- "Sometimes, the mission is not worth the cost. You know that, so why are you still doing what he asks?"
- "Because if I'm wrong, then all of this is for nothing. Do you understand Tatsu? I left Felicity. I left my children, so if the Monitor can't fix this and if he's not here to help, then all these things I have sacrificed and all the things that so many people have sacrificed will have been for nothing."
- —Tatsu Yamashiro and Oliver Queen on Mar Novu
- Stephen Amell as Oliver Queen/Green Arrow
- David Ramsey as John Diggle/Spartan
- Rick Gonzalez (credit only)
- Juliana Harkavy (credit only)
- Katherine McNamara as Mia Smoak/Blackstar
- Ben Lewis as Older William Clayton
- Joseph David-Jones as Connor Hawke
- LaMonica Garrett as Mar Novu/The Monitor
Special appearance by
- Audrey Marie Anderson as Lyla Michaels/Harbinger
- Andrea Sixtos as Older Zoe Ramirez
- Charlie Barnett as Older John Diggle, Jr.
- Kelly Hu as Chien Na Wei/China White
- Rila Fukushima as Tatsu Yamashiro
- Lou Ticzon as David Chin
Preparation ran from July 12 until July 22, 2019. Shooting ran from July 23 until August 2, 2019.
- The title of this episode references the last line from "" that is said by Amanda Waller after Oliver finds himself in Hong Kong and gets recruited by her.
- The opening scene of this episode is also very similar to the opening of the last flashback scene in season 2, when Oliver wakes up in Hong Kong.
- Similarly to the previous episode, this episode also has many references and callbacks to previous episodes, mainly from flashbacks of season 3.
- When Diggle and Oliver goes to a café, the shots have very much resemblance to the ones in "", where Oliver tries to send an email to his mother. When they get access to A.R.G.U.S. computer, Oliver also says how it would've been nice to know that ten years ago.
- China White and Alpha-Omega virus return as the main plot in this episode.
- When arguing about using the Alpha-Omega virus as bait to lure Chien Na Wei, Tatsu reminds Oliver how Maseo made the same gamble, referencing to the events of "".
- Tatsu talked about how Nyssa forced her to give up the Lotus in order to save Thea, which happened in "".
- Chien Na Wei talks about their previous fight to Tatsu, that happened in "" and resulted in Tatsu's loss.
- Tatsu and Oliver talk about Akio's death that happened in "", which is the main reason Tatsu became a vigilante in Hong Kong after her exile from the Crescent Order. Tatsu also reminds Oliver how grief and anger made him torture General Shrieve for hours, referencing what happened in "".
- Oliver mentions that he and China White have been enemies from the start. China White was the first recurring villain had, first appearing in "".
- The final scene of the episode reveals that Lyla is working with The Monitor to prevent the Crisis. This is a reference to their relashionship in the comics - Lyla being Mar Novu's adopted daughter.
- Laurel discovering that Earth-2 no longer exists is reminiscent of a similar scene in the original Crisis on Infinite Earths story, where Jay and Wally discover that Earth-3 no longer exists.
- ↑ Arrow #8.2 Photos: “Welcome To Hong Kong” - GreenArrowTV
- ↑ Beth Schwartz (@SchwartzAprrovd) - Twitter
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