In this penultimate episode of the series, Michael (Jason Bateman), Buster (Tony Hale), and Gob (Will Arnett) encounter Saddam Hussein lookalikes, one of whom is played by Larry Thomas, who famously portrayed the Soup Nazi on Seinfeld (1989). This is an inside joke for the series, as George Bluth (Jeffrey Tambor) comments in an earlier episode that when he first met Saddam, he thought he was meeting the man who played the Soup Nazi.
The character of Cho (Mitsu) came from an idea that Mitchell Hurwitz had that Wayne Jarvis (John Michael Higgins) lived a double life as a Green Hornet-like hero by night. The Green Hornet had a Japanese sidekick named Kato.
One of the Saddam look-alikes says that they "wanted to keep the house for just one more season," referring to the Arrested Development writers, who felt the show had ended too early.
George Michael (Michael Cera) was going through Maebye (Alia Shawkat)'s address book to send out invitations for her surprise party. The name under Steve Holt in her book is R. Howard as in (Ron Howard), the narrator and producer of this series, as well as a feature film director, who later references why he wasn't at the party.
When Michael (Jason Bateman), Gob (Will Arnett), and Buster (Tony Hale) are leaving Baghdad by rickshaw, a Hollywood-style sign is visible on a mountainside, reading "Baghdad" in Arabic, but it is written backward, presumably a joke about the incompetence of occupying U.S. forces.