|Everyone is eager to use the Loom of Fate, but the team must decide who they want to bring back first leaving Charlie to make a tough choice. Sara struggles to understand what has happened to her and with the help of Constantine and Ava, they try to figure out how to help her. Meanwhile, Rory has a guest on the ship that he is trying to impress.|
With the goal to bond with Lita, Mick takes her on board the Waverider for the weekend. Gary likewise brings his new therapy dog, Gary Junior, on board. Charlie attempts to utilize the Loom of Fate to revive Behrad; however she comes up short, making the ship lose power. Sara awakens from her trance-like state, just to find she has gone blind and gained the power to see the not-so-distant future as visions of individuals' demises whenever someone touches her. Meanwhile Mick tries to get close to Lita by helping her do history studies with Nate. When the Legends discover that the Loom sections have disappeared and the Waverider was disrupted, they promptly blame Astra.
In the wake of hearing a voice advising her to murder Gary when Junior was close by, and Zari discovering a film of the group wrecking the ship, Sara and the others understand that Junior is to be faulted. Gary uncovers that Junior was a "salvage" from Hell, causing Ava to understand that Junior is really a hellhound who was known as The Son of Sam's demon dog named Marchosias. After Gary stops Marchosias from making Nate kill Zari, Marchosias reveals that he was going kill them all because he hates Humans. Constantine sends Marchosias back to Hell and Gary recoups the parts of the Loom. Ava takes Sara back to the MedBay to fix her visual deficiency; however, Gideon can't discover anything amiss with her.
- Caity Lotz as Captain Sara Lance
- Maisie Richardson-Sellers as Charlie
- Tala Ashe as Zari Tarazi
- Jes Macallan as Ava Sharpe
- Olivia Swann as Astra Logue
- Amy Louise Pemberton as Gideon (voice)
- Nick Zano as Dr. Nate Heywood/Steel
- Dominic Purcell as Mick Rory/Heat Wave
Special appearance by
Preparation ran from November 5 until November 14, 2019. Shooting ran from November 15 until November 27, 2019.
- When Zari is looking at the picture of her and Behrad, the emotional poignant theme is heard playing from the episode "", when Snart pretended to kill Rory and instead actually left him marooned in an unknown time period.
- Gary says he got "Gary Jr. II", a rabbit, from a mysterious carnie, who told him not to feed it after midnight, an obvious reference to the film Gremlins, referencing the rule not to feed the Mogwai past midnight.
- Several callbacks to previous episodes are made:
- Sara is surprised when Gideon states that there are no abnormalities in her ocular region; however, Sara already saw past this point while talking to Ava.
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