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Numbers (四凶の符,Nanbāzu?, lit. "Charms of the Four Perils") is the third episode of the Toaru Kagaku no Accelerator anime series. It was broadcast on July 26th 2019, and was directed by Tominaga Tsuneo, was storyboarded by Kamanaka Nobuharu, and the script written by Ishikawa Asami.
After Last Order discovers Esther with Accelerator and throws the boxes of food she brought for Accelerator at him, the three go to a restaurant for a meal. Leaving the other two briefly, Accelerator phones Yoshikawa Kikyou to ask her to look into DA.
Esther visits the hospital morgue to perform a ritual on the body of Hitokawa Hasami so she can be properly laid to rest. Accelerator observes and as a result of touching a mass of residual thoughts that surface during the ritual, sees the dead girl's memories. A pair of DA members posing as Anti-Skill officers interrupt and attempt to destroy the corpse (as evidence linking to DA) but are thwarted by Accelerator. As they prepare to fight, the Huotou still attached to Hitokawa Hasami's body activates.
The voice actors/actresses for the unnamed DA members are Maeda Hiroki, Koga Akira, Kijima Ryuichi, Ishikari Yūki and Ishi Misa.
The voice actress for the unnamed clerk is Mano Ayumi.
Residual thoughts are referenced for the first time in an animated adaptation.
Last Order's complaints about feminine sensibilities to Esther after reading it in a "book" while a sequence of clones reading women's magazines is shown is likely a reference to an episode of Index II. In it, the clones based their knowledge on interactions between men and women through magazines they have read.
Qiong Qi is a mythical Chinese creature mentioned in the Shanhaijing, part of a group referred to as the Four Fiends or Four Evils (Si Xiong), who were banished by Emperor Shun. Hundun and Taotie are also members of this group.
A Huotou is a legendary creature in Southern Chinese folklore, described as a dog-shaped monster that eats feces and blows fire.