Episode 3: Turnabout Serenade is the third episode in the video game Apollo Justice: Ace Attorney. The Borginian duo Lamiroir and Machi Tobaye are invited by the Gavinners to guest perform in their "Guilty as Charged" Tour. However, the concert comes to a shocking conclusion when Lamiroir's manager, Romein LeTouse, is murdered in a series of events that seem to mimic the lyrics to the song "The Guitar's Serenade". Apollo Justice is subsequently hired to go to court for Tobaye in a highly publicized trial, with Phoenix Wright busy on his own mission. Justice uncovers a darker international plot behind the scenes, but although it becomes plain who the real culprit is, he will require more than the evidence on hand to secure his case under the current court system.
The intro depicts the Gavinners concert in the first of three acts. There are silhouetted close-ups of Klavier Gavin and another band member. Klavier Gavin then announces that there will be a special guest for the next act, and that there will be a 20-minute intermission.
During a conversation in the early part of the investigation, Justice and Gavin have the following exchange: "Nobody told me there would days like these" "Strange days, indeed". "Nobody told me there would days like these. Strange days indeed" are lines in the chorus of the John Lennon song "Nobody Told Me".
There are several references to the band The Police when investigating the Gavinners's dressing room. If a poster of a policeman is examined, Trucy wonders if the band are trying to "trick kids into thinking the police are some kind of band". Justice thinks "that's just silly. Who'd name a band the "police"?" Also in the dressing room, if the red light on the wall is examined, Trucy thinks that it would "be cooler if they turned that red light on". Justice, on the other hand, says that "They don't have to turn on the red light", which is a reference to The Police song Roxanne. Also, when Trucy tells Apollo that the members of the Gavinners are all connected to the police, Apollo responds, "The Police?" (capitalised, indicating a name), then Trucy clarifies that she means the "real police".
Before the second trial, when Valant Gramarye enters the courthouse using the front door, Justice comments that he's entering just like a regular muggle. This is a reference to the Harry Potter fantasy novels, which are set at a school for magic, with non-magic users (i.e., the general public) being referred to as "muggles". The term "muggle" has, since 2003, been recognised as a pejorative in the English Dictionary, used to describe someone who lacks skill in a field of expertise.
During the second day of investigation, Trucy mentions Lamiroir as having "elephant ears", to which Justice replies: "Somehow I don't think it means what you think it means." Furthermore during the second day of the trial, Justice says: "That's the only logical explanation", referring to the position where Lamiroir was when she witnessed the crime. Gavin responds by saying: ""Logical"? I do not think this word means what you think it means, Herr Forehead!" These are references to a similar line said by the character Inigo Montoya to Vizzini (Vizzini: "HE DIDN'T FALL? INCONCEIVABLE." Inigo Montoya: "You keep using that word. I do not think it means what you think it means.") in the 1987 American romantic comedy adventure film The Princess Bride.
Examining the bouquet in Lamiroir's dressing room on the second day of investigation leads to Apollo suggesting the idea of a "magnolia made out of steel". This alludes to the 1989 American comedy-drama film Steel Magnolias.
Examining the right most poster on the wall in Lamiroir's dressing room reveals that it is an advertisement for an upcoming production called "Case Closed", which Apollo says he wouldn't mind seeing. This could be a reference to the murder mystery manga and anime series, Case Closed (also known as Detective Conan).
If the silk hat in the Wright Anything Agency is examined, Trucy will say "Of course! My hat's like a little universe! Bigger on the inside than on the outside!" after which Justice will reply with "Hmm... That reminds me of a sci-fi show I used to watch." This is a reference to the sci-fi show Doctor Who, in which the main protagonist, The Doctor, travels in space and time in his TARDIS, which is bigger on the inside than it is on the outside.
Before going to the Gavinners’ dressing room to find Lamiroir and after Valant Gramarye disappears again, Apollo thinks, “Curiouser and curiouser...” This could be a reference to Alice in Wonderland, in which Alice says the same thing.
When Justice asks Lamiroir if she is the siren that LeTouse spoke of before he died, she says, “That is the meaning of my name is Borginese, yes.” instead of “That is the meaning of my name in Borginese, yes.”
During Justice's investigation on the second day, Klavier Gavin, while in his office, says "...Too tell the truth, I'm not even sure what it is" instead of "...To tell the truth, I'm not even sure what it is".
Outside Sunshine Coliseum there is a figure that appears to be a man wearing orange and having a picnic with what appears to be a woman. This could conceivably be Phoenix Wright's childhood friend Larry Butz (considering his attire and his presence with a woman), although the figure is too far away to say for certain and it may just be a subtle nod by the developers. A few months later, another figure can be seen outside the Coliseum wearing pink and painting, which may also be Butz (as "Laurice Deauxnim") but, once again, he is too far away to say for certain.
Before Crescend takes the stand, Gavin states that he was the first detective he ever worked with, despite the fact that Dick Gumshoe was in charge of the initial investigation for his first trial. Although seemingly a contradiction, Prosecutor Miles Edgeworth has been shown, with the assistance of detectives, investigating and solving cases that he did not end up actually prosecuting for (e.g., Turnabout Reminiscence and Turnabout Ablaze).