Durarara!! (TV)

In ep 3 around 8:11, you can see on the manga cover Yasakura Hime from Yozakura Quartet.

In ep 3, around 8:44, Karisawa Erika referred to "pipiru piru piru angel" referring to Bokusatsu Tenshi Dokuro-Chan

Episode 3: Yumasaki claims that the "Dollars" gang fights against a Flame Haze, a reference to Shakugan no Shana.

Episode 6 (21:15min) when Walker and Erika are about to start to torture one of the kidnappers of Caztano, they ask him to choose a book which torture will be related. The book are light novels, the top is the volume 01 of "Bokusatsu Tenshi Dokuro-chan", the second is "Rou Cube" from Aoyama Sagu, and the third is "Ladies vs Butlers" from Tsukasa Kouzuke, the other two are too difficult to identify

Episode 6 (22:37min to 22:45min) there are posters and outdoors showing Enma Ai, Hone onna, Wanyuudo and Ichimokuren from the Jigoku Shoujo series

Episode 6 (18:14min) The password for Dollars' website is Baccano.

In ep 7, around 05:16, you can see on the "Now Showing" movie sign different anime from left to right: Le Portrait de Petit Cossette, Darker than Black: Gemini of the Meteor, <non-reference>, Baccano, Jigoku Shoujo, Cencoroll

Episode 11 (12:00) Isaac and Miria from Baccano! makes an appearance. Both Durarara and Baccano! are written by Ryohgo Narita and produced by Brain's Base.

In ep 13, around 5:19, the shop shown "animate" is a real anime shop in Japan, and you can see posters of a couple anime on its wall, one of them being So-ra-no-wo-to.

Ep 13, around 5:51, Erika makes a "Nogizaka Haruka no Himitsu" reference about a certain wealthy girl's secret.

In ep 15 at 19:47 to 19:54 there is a reference to Yotsubato since he wants to have a daughter with green hair and neighbors that are 3 sisters.

In ep 17 around 12:34 you can see a enlarged anime face that strongly resembles Nogizaka Haruka, a reference used before in the show.

In ep 17, around 12:48, Yumasaki talks about the short novel Kino's Journey, which was made into anime back in 2003.

In ep 18 around 11:26, you can see a scene from Baccano! on the television on the building.

In ep 20, at 15:13-15:18, where some anime figurines are shown in the background, figurines of Horo, Aisaka Taiga and Shana were being played with by Kadota's friends.

Also at episode 20, at around 18:24, a picture of So-ra-no-wo-to was briefly shown.

episode 20, 2:05 Claude from Kuroshitsuji 2 appears briefly for a few seconds on the large screen on the building towards the right side.

Episode 24 at 18:36 reference from ladies v butlers

The only English voice actor who is common to both "Baccano!" and "Durarara!!", which were both created by author Ryohgo Narita, is Carrie Savage, who voiced Lua Klein in the former and Mika Harima in the latter.

In Episode 1 at 06:40 Mikado bumps into a cardboard cutout of Holo from Spice and Wolf.

In Episode 1, at 1:57, the billboard displays Issac and Miria from Baccano! in the same pose from the second DVD cover.

In episode 1, at 6:34, the large television screen in the background plays a clip of Jacuzzi and Nice from Baccano!

In Episode 3 at around 7:46, the movie posters feature characters from the director's past works Baccano and Jigoku Shoujo.

About the appearence of Yasakura Hime (from Yozakura Quartet) in the manga cover in episode 3 (8:11min) Yumasaki Walker say that "Suzie Yasuda"will be signing at Toranoana store - Suzie Yasuda is Suzuhito Yasuda - creator of Yozakura Quartet and also the character design of Durara!

In episode 3, at 7:46, pictures of various characters from Baccano! are displayed on a building.

In episode 3, at 8:36 and again at 8:47, pictures of Ennis from Baccano! are displayed on a building in the background.

In Episode 3 at 7:46, The movie posters include Baccano, Cencoroll, Kuroshujisu, HellGirl, and the last 2 cannot be identified.

In episode 4, around the 10:15 mark, there is an animation error regarding the way the surroundings are reflected off of Celty's visor. As Celty approaches and eventually passes things in the surround, objects should get smaller as they move towards the edge of the visor because the visor thins as it moves toward the edges. Instead, objects increase in size as Celty passes them, a budget-saving animation shortcut that creates the bizarre effect of making her visor look like it's driving toward something in the opposite direction.

In episode 7, on the marquee of the film theater, we see a poster for the film 執事の沈黙 (Shitsuji no chinmoku, "The Silence of the Butlers"). This is a pun on the film "The Silence of the Lambs" (which translates as 羊の沈黙, Hitsuji no chinmoku).

In episode 7, near 16:25, there seems to be some sort of theatre area that have actor-characters that look very much like the Power Rangers--a classic show the Japanese love.

In Episode 8 (around 8:10) Kadota Kyohei is reading the volume 1 of Toaru Majutsu no Index light novel series.

In episode 8, at approx. 9 minutes and 14 seconds in, when Walker is asking Simon if he's seen Erika, two girls walking in the background are notably not monochrome in color. This is significant as they are Mairu and Kururi Orihara, Izaya's kid sisters (fraternal twins, at that). They're only formally introduced in the episode 25 OVA.

In Episode 10 (19:22) When showing each other cards, they refer to "Biribiri" and "Himegami" which is reference to the characters in To Aru Majutsu no Index and To Aru Kagaku no Railgun Series.

In episode 10, at 22:13, the password Mikado typed to log in the dollars site is "baccano"

In episode 11, one of the ring tones says "Ippen shinde miru..." which is a reference to Jigoku Shoujo (Enma Ai's most common quote)

In episode 11 at 5:16, The announcement for jumbo melon bread is a reference from shakugan no shana, shana's favored jumbo melon bread.

In episode 11, the scene at about 13:16 where Mikado unpacks and turns on his new PC contained a lot of references. The PC box indicated that the hardware manufacturer was NEG which is a parody of the famous Japanese IT company NEC Corporation. The boot-up screen indicated that the operating system was “wbunte” which is a parody of the famous Linux operating system “Ubuntu”. It's a bit strange, though, since the PC box indicated that the PC had Windows 7 installed on it. In addition to that, the boot-up screen indicated that the BIOS was created by Phantomas Technologies which is a parody of the French fictional serial killer “Fantômas” created by Marcel Allain and Pierre Souvestre in 1911.

In Episode 12.5 the last line of the episode is from Robert Browning's poem Pippa Passes.

In episode 12.5 the phrase "Ventura Ventura, space people" said by Erika and Yumasaki is probably a reference to Urusei Yatsura where it was used by Ataru's classmates to summon a UFO.

In episode 12.5 at 8:27, MIB is a reference to Men In black an American Movie.

In episode 21 at 7:03, Red Snake is a reference to Red Bull, an energy drink.

In Episode 24 at 18:35 the cardboard cutout of Selnia Iori Flameheart from Ladies versus Butlers! can be seen.