- For the eponymous group, see Thanatos Guild.
- "Like me, you are an Heiress to the Demon. That is something you can never truly run from."
- —Nyssa al Ghul to Thea Queen about her father
Nyssa al Ghul returns to Star City to warn Thea that a group of renegade League of Assassins members is planning to attack her. This group, led by Athena, is intent on finding a mysterious box that Malcolm left behind and will stop at nothing to get it. Nyssa helps Oliver come to a life-changing realization.
- The title of this episode comes from the name of another group of League of Assassins, which was led by Malcolm until Athena took charge.
- This is the final episode to credit Colton Haynes as a special guest star. From Season 7 onwards, he is credited as a series regular again.
- Going to look for Malcolm's map, Felicity asks whether the traps laid around the location housing it are more comparable to "Raiders or Temple of Doom", referencing two films in the Indiana Jones franchise.
- Thea later tells Felicity that it's more like Raiders, before triggering a trap that shoots arrows, similar to a scene in the aforementioned film.
- The cap Roy wears is a callback to him wearing a cap in the New 52 Red Hood and the Outlaws series, and the DC Rebirth comics.
- Felicity makes a reference to the Hellraiser franchise due to the map's box's resemblance to the Lament Configuration.
- Curtis mentions that Dinah's murder board is making him feel "very Alan J. Pakula", referencing the notable film director, writer, and producer.
- When Roy and Felicity are trying to figure out how to defuse the bomb, Roy suggests, "I can freeze it, I've done that before". This is a reference to the episode "" where Roy freezes a bomb that's about to detonate underneath Rockets Arena, as per Felicity's instructions.
- In Thea and Oliver's last scene together, Oliver says "I'm gonna miss you so much", to which Thea responds, "You'll be with me the whole time." This mirrors their first scene together in "", where after Oliver and Thea are reunited after five years, Thea tells Oliver, "I missed you so much" and he replies, "You were with me the whole time."
- This episode marks Willa Holland's last appearance in the show as a series regular, in addition to being credited in the main cast bill.
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