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Claude from Kurosh*tsuji 2 appears briefly on the large screen on the side of building in the background.
Erika and Walker are looking at anime figurines of the famous characters Horo from 'Spice and Wolf', Aisaka Taiga from 'Toradora!' and Shana from 'Shakugan no Shana'.
You can see a scene from Baccano! being played on the television on the side of the building.
Yumasaki talks about the short novel Kino's Journey, which was made into anime back in 2003.
You can see an enlarged anime face that resembles Nogizaka Haruka from Nogizaka Haruka no Himitsu.
The comment about wanting a daughter with green hair and three sisters as neighbours isa reference to the series "Yotsuba to!?"
When Erika makes a comment about a a certain wealthy girl's secret she is referring to Haruka Nogizaka from the series "Nogizaka Haruka no Himitsu".
The shop shown in this episode; "animate" is a real anime shop in Japan, and you can see poster for the series So-ra-no-wo-to on its walls.
One of the Dollars' ringtones says "Ippen shinde miru..." which is a reference to Enma Ai's most common quote in Jigoku Shoujo.
Isaac and Miria from Baccano! make an appearance at the Dollars meeting. )Both Durarara and Baccano! are produced by Brain Base).
When showing each other cards, the characters refer to "Biribiri" and "Himegami" which are references to the characters in To Aru Majutsu no Index and To Aru Kagaku no Railgun.
On the marquee of the film theater, we see a poster for the film "The Silence of the Butlers". This is a pun on the film "The Silence of the Lambs".
The "Now Showing" movie sign advertises the following anime from left to right: Le Portrait de Petit Cossette, Darker than Black: Gemini of the Meteor, Baccano, Jigoku Shoujo and Cencoroll.
The password for Dollars' website is Baccano.
There are posters showing Enma Ai, Hone onna, Wanyuudo and Ichimokuren from the Jigoku Shoujo series featured in the background shots of this episode.
The morning ritual of drinking milk from the carton is seen in animes like "To aru Kagaku no Railgun" and "To aru majutsu no Index" when Komoe, Tsuzuri and Yomikawadrink milk in this manner after the bath.
When Walker and Erika are about to torture one of the kidnappers they ask him to choose a book from which they will take the means of torture. The books are volume 01 of "Bokusatsu Tenshi Dokuro-chan", "Rou Cube" from Aoyama Sagu, and "Ladies vs Butlers" from Tsukasa Kouzuke.
When Yumasaki claims that the "Dollars" have fought against a Flame Haze she is referring to the show Shakugan no Shana.
When Yumasaki Walker say that "Suzie Yasuda" will be doing a signing at Toranoana store he is referring to Suzuhito Yasuda the creator of Yozakura Quartet and also the character design of Durarara!!
The movie posters seen in the background of this episode all feature characters from the director's past works Baccano and Jigoku Shoujo.