"Quagmire's Dad" is the 18th episode of the eighth season of the animated comedy series Family Guy. It originally aired on Fox in the United States on May 9, 2010. The episode features Quagmire after his father, Dan Quagmire, returns to Quahog and comes out as a trans woman. Dan has decided to have gender-affirming surgery and changes her name to Ida. Meanwhile, Brian travels to a seminar and, upon returning, has sex with Ida, who he does not realize is Quagmire's father.
The episode was written by Tom Devanney and directed by Pete Michels. It received generally negative reviews with most critics and audiences making comparisons between the episode and the 2007 film I Now Pronounce You Chuck & Larry, in addition to receiving some criticism for its portrayal of transgender identity, including from the Gay and Lesbian Alliance Against Defamation (GLAAD) and the Parents Television Council. According to Nielsen ratings, it was viewed in 7.22 million homes in its original airing. The episode featured a guest performance by Wally Wingert, along with several recurring guest voice actors for the series. "Quagmire's Dad" was released on DVD along with ten other episodes from the season on December 13, 2011.
Plot
Peter and Joe visit Quagmire and are introduced to his father, Lieutenant Commander Dan Quagmire. Expecting to see the inspiration for Quagmire's sexual behavior, they are surprised by Dan's stereotypically gay mannerisms.
The following morning, Quagmire invites Peter and Lois to the Naval Ball being held to honor his father, but soon begins arguing with Peter about his father's sexuality. At the ball that night, members of the Navy bombard Quagmire with compliments about his war-hero father, most of which can be taken as double entendres about Dan's alleged homosexuality. Concerned that his dad might actually be gay, Quagmire confronts him and Dan states that he is not gay, but is instead "a woman stuck in a man's body" and that he plans to have a sex change operation during his stay in Quahog, much to Quagmire's dismay. The surgery is a success, with Quagmire's dad emerging as "Ida".
That night, Ida and Quagmire join the Griffins for dinner. As the dinner begins, however, Quagmire becomes frustrated when the Griffins turn the conversation towards Ida's operation, and storms out of the room. At Quagmire's home, Quagmire tells Ida that he is not sure he can deal with her new gender identity. Saddened, Ida leaves Quagmire's home and decides to stay at a nearby Marriott Hotel.
Meanwhile, Brian has been out of town attending a seminar on creating a web series and is unaware of what has happened. On his way home, Brian stops at the Marriott, meets Ida, and has a few drinks with her. Quickly bonding, they retire to Ida's room for sex.
The next morning, Brian shares his newfound love with Peter and Lois before showing them a picture of Ida on his cell phone. Peter and Lois go into hysterics, while Brian, still unaware of the whole story, dismisses them as jealous. After Stewie fills him in on the events that transpired in his absence, telling him that Quagmire's newly gender reassigned father has been staying at the same hotel as Brian, Brian is amused until Stewie informs him that Dan Quagmire's new name is Ida. Realizing that he has had sex with Quagmire's transsexual father, Brian vomits profusely for thirty seconds straight, and then he and Stewie begin panicking.
Ida returns to Quagmire's home and apologizes, and Quagmire returns the favor, reconciling their relationship. Ida tells Quagmire that she met someone, and he is initially excited to know who it was. However, when she reveals that it was Brian, whom Quagmire loathes, he becomes enraged.
Brian is traumatized after finding out about Ida and, when he hears Quagmire storming inside the house, he tries to hide under Peter and Lois's bed, but Quagmire finds him and brutally beats him up, ordering him to stay away from him and his family. As Quagmire leaves, Brian retaliates by telling him "Hey, I fucked your dad", before angrily slamming the door shut.