"Lady Detective Melon"note with the English title of "Revenge of La Nerd".
Paris, France. Lupin has sent a letter to the Police Department, announcing his intention of robbing all the banks of the city. When Zenigata interrogates the chief about the countermeasures, he replies that they have chosen a very special person to help against the thief: Melon Ganimard, also known as Deca-Melon, the granddaughter of Inspector Ganimard, the archenemy of Lupin the 1st: with her help, the chief is sure that Lupin will be caught this time, even though Zenigata is a little skeptical. Melon decides to empty all the banks of Paris and put the money in the main Police Office, unaware that Lupin and his gang, sans Fujiko, are keeping an eye on the operations.
Due to Fujikos absence, Lupin is demotivated, and when Jigen shows him a picture of Melon hes not impressed by the bespectacled tomboyish detective. In the chiefs office, Melon and Zenigata discuss about the plan when a policeman comes in to report; the lady detective points out a paper on his back with Lupins call card. When Zenigata chides him for not noticing that earlier, the policeman retorts that they didnt noticed either and is shown that all of them, including the chief, have a call card on their back. Outside the building Jigen and Goemon are watching through the window as Lupin disguised as a policeman chews out the presents and think he may be overdoing it a little. Suddenly the lady cop takes a picture of a masked Lupin, and Goemon realize that shes using a special X-ray camera which allows her to see through Lupins disguise; hes right, and Melon promptly shows the picture of Lupin to Zenigata, then quietly tells him to look at the window, from where he can spot Jigen and Goemon lying in wait. The two detectives close the shades and tell Lupin hes been outsmarted and confront him, mentioning the whereabouts of the money in the station. Lupin seemingly gives up, only to shoot the lights off and reveal that the calling cards still on the trios backs are written with special glow-in-the-dark ink, allowing Jigen to snipe the three cops with sedative bullets and take them out of commission as Lupin leaves, heading for the money, and Melon swears revenge.
The heist is a success, and Lupin and his gang are now in their secret hideout while the police is unsuccessful in finding them, until Fujiko calls Melon, revealing the location of Lupins hideout: a house next to a broken car deposit. While the thief bemoans the lack of Fujiko (much to the dismay of his partners), Melon and Zenigata arrive just outside the hideout and discuss a way to catch the gang; Melon suggest she should infiltrate the house, knowing that Lupin has a weakness for women, but Zenigata retorts that said weakness applies to pretty women, not homely ones like Melon. Seemingly taken aback, the lady detective goes back in the car where she changes dress and make up, soon coming out as a stunning beauty, enthralling Zenigata. Thanks to her charm she manages to persuade Lupin to let her in, while Zenigata gathers reinforcements. However, Lupin soon manages to see through her disguise but she handcuffs him with special manacles designed by her grandfather in order to restrain Lupin the 1st; true to her word, Lupin is unable to open them, while Melon tells him to give up, since the police is surrounding the place and theres no way out. Soon Zenigata and his people storm the place, but Lupin is nowhere to be found. An unconscious Melon points the way, but as the cops leave it turns out shes really Goemon in drag.
Lupin and Jigen manages to flee using a hidden vehicle and make it to the subway station with the money and a still unconscious Melon handcuffed to him. The gang eventually makes it to the train where Lupin manages to free himself from Melon and leave her sleeping on the stolen bills. Then Zenigata manages to board the train and confront Lupin for Melon, while in the car with the money Fujiko approaches Melon. Lupin eventually manages to get rid of Zenigata and returns to the money pile where Melon is waking up; the lady detective points her gun at Lupin, who states he wants to give all the stolen money to her if she agrees to stop chasing him. Surprisingly, Melon asks Lupin if hes serious and asks him to promise her: as Lupin promise, the woman starts jumping around and dancing in joy, much to the thiefs puzzlement. Turns out that Melon is actually Fujiko in disguise, and now that Lupin gave his word all the stolen money is hers. Stunned, Lupin has no choice but to take it in stride, while Fujiko dances around the money.
This Episode Contains Examples of:
- Action Girl: Melon is a skilled gunswoman, good at throwing handcuffs and is pretty smart and good at planning to boot.
- Adaptation Deviation: While the name is the same, Melon from the manga was actually a man and a ruthless cop Lupin wanted to punish for his extreme actions, such as gunning down a young boy as he was about to confess his crimes to a priest.
- Crazy-Prepared: Melon's special camera, which can take pictures of people and see through masks.
- Cutting the Knot: In the climax, Lupin is handcuffed to Melon and the cuffs are actually too hard for him to lockpick at the moment. Solution? Knock her unconscious and run away to safety, to remove the cuffs.
- Disguised in Drag: Goemon as Melon near the end. He's not enthusiastic about it...
- Dub Name Change: From Melon to La Nerd in the English dub.
- Hidden Buxom: Under her modest civilain clothes, Melon hides a surprisingly large pair of breasts, to the point that all that Fujiko needed to disguise as her was a wig and a mask. Suddenly, her name can be seen under a new light...
- Idiot Ball: Pretty much everyone in the office: Lupin, as noted by his own partners, overdoes a bit and is almost caught by Melon and Zenigata, while Melon, despite realizing that Jigen was nearby, ready to snipe them, didn't remove the calling cards from everyone's backs, which allowed Lupin's plan to proceed unhindered.
- It's Personal: Melon's reasons for capturing Lupin, since she's the granddaughter of inspector Ganimard, Lupin the 1st's historical nemesis.
- Kick the Dog: Lupin dismissing Melon as "ugly"note upon seeing her picture.
- Mugged for Disguise: Near the end of the episode, Fujiko steals Melon's clothes and identity while she's unconscious. What Fujiko did with her is unknown.
- Nerd Glasses: Melon wears a pair of thick, round glasses, though apparently she can see perfectly without them (or she uses contact).
- Oh, Crap!: Zenigata, when he realizes that there's a train coming down on him.
- Out-of-Character Moment: Melon in the end is seemingly okay with giving up on revenge in exchange for all the money of Paris' banks offered by Lupin. Subverted in that she's Fujiko, disguised.
- Punny Name/Meaningful Name: As mentioned above under Hidden Buxom, there's a pun in Melon's nickname: while "Deka" means detective in Japanese and makes her sounds like The Decameron, "Deka" can also mean "huge, enormous", and Melon(s) is a typical slang word for boobs. As it turns out, she really does have "huge melons".
- Traintop Battle: The final confrontation between Zenigata and Lupin.
- Unkempt Beauty: Melon can go from looking like a scrawny, short-haired homely girl to a stunning woman with an impressive bustline rivalling Fujiko's.
- What Happened to the Mouse?: What happened to Melon after Fujiko hid her away on the train is anyone's guess.