"Postcards from the Ed" is the 24th episode of Season 4 and 101st episode of Ed, Edd n Eddy. In this episode, Plank's parents are visiting the Cul-de-Sac and Jonny entasks Ed to give them the time of their lives. Eddy, after a while, decides to help show Plank's parents around the Cul-de-Sac by kidnapping them and showing them around on a makeshift tour bus as he plans to get a lot of money from the tour he gives to Plank's parents. Ed and Edd must now retrieve Plank's parents from Eddy before something bad happens to them.
The episode starts with the kids gathered besides a giant mock-up of the Sphinx. Rolf is amazed by it, saying it was foretold by the soothsayers. Edd then walks out and introduces himself as an Egyptologist. Edd leads them inside, and along the way points out some interesting hieroglyphics. When asked by Jimmy what they are, however, he finds it impossible to decipher them; things get worse when Sarah guesses that her brother drew them. Thankfully, there's a passageway beside him that happens to be the next stop on the tour. Edd leads them through the passageway, which opens up into the room with the sarcophagus. Eddy greets the kids, and introduces the mummy as the great King Tuckyershirtin. He and Edd then pull out some crowbars and pry the great tomb open.
Unfortunately for Eddy's scam, there's nothing in the box. He and Edd stare inside in disbelief. At that moment, Ed walks in wearing toilet paper and eating a sandwich, saying he was grabbing lunch. Eddy angrily tells him to act like a mummy, and Ed does, but by now the kids have left, their suspension of disbelief broken and mangled. Eddy runs outside the sphinx, trying to catch them while dragging Ed, but by now they're long gone. Even worse, some dust flies up Ed's nose, and he sneezes the tomb away. As Eddy fights with Ed, Edd arrives wearing one of the boxes with an eye painted on it over his head. Jonny then walks up with two boards and introduces them to the Eds.
After introductions have been made, Jonny walks the pieces of wood to another part of the construction site so they can take pictures. After he's done this, he leaves them there and comes back to the Eds. He then reveals to them that both he and Plank are worn out; Plank's Mom and Dad have seemingly boundless energy as tourists. Ed, sympathetic but stupid, offers to take care of them for a while so Jonny can rest, and Jonny instantly accepts. Eddy is annoyed by this, but Edd is willing to support his friend. Eddy, hearing this, gives up and says he's going home. Eddy does so and spends some time alone reading a magazine before suddenly getting an idea while in the bathroom.
Meanwhile, Ed and Edd are happily showing Plank's parents around the neighborhood. Edd is in the middle of pointing out an oak tree when Eddy runs into their tour with a giant cardboard bus. Eddy swiftly grabs the two boards, sets them on top of the bus in chairs, and suggests that they join his "Deluxe Tour Line". He then instructs Ed to give him a push. Ed happily does so, and Eddy goes flying down the street. A few seconds after he's shoved the bus, though, it occurs to Ed that Eddy just kidnapped his charges. He races after the bus while Edd begs Ed to come back and free him from the tree he's stuck in. Ed, unable to catch up to the bus, comes back and pulls Edd loose. Ed then worriedly complains that Eddy has stolen his responsibles.
While Eddy takes Plank's parents on a tour of the cul-de-sac that includes The Great Mountains of Cul-de-Sacia and a viewing of the Diaper-Rash Boy and his cohort, the Frog-Mouth Brat, Ed and Edd search for Eddy. Ed's search starts at Eddy's room, much to Edd's annoyance. However, when Edd spots Eddy's cologne, he gets an idea and has Ed sniff it. Ed is able to track Eddy by the scent, and they follow his path. When they catch up with him, he's at the playground showing Plank's mother and father the world's oldest blade of grass and largest litter box (the sandbox). As he does this, he upsells them expensive junk as memorabilia, saying that it'll all go on Jonny's tab.
When his friends call to him, however, he pulls up the stopper and starts rolling again. Eddy's bus swerves through the playground, passing under what Eddy calls "The Great Monkey Bar Bridge". At this bridge, tragedy strikes, as the bus is built too tall. As Eddy and Plank's parents are on the roof of the bus, they have to duck. While Eddy is easily able to do this, his customers are not, and their necks snap off on the monkey bars, "killing" them. Their heads fly off and land on Ed and Edd, who peel them off and scream. Eddy, attention drawn by the calamity, looks away from where he's going for a split second. This second is long enough for the bus to crash into a tree and fly backward, landing on Ed and Edd.
Once Ed and Edd crawl out from the wreckage, they are quick to point out the damage to Eddy. Edd worries about what this will do to Jonny mentally; unfortunately for him, he doesn't have to worry long, as Jonny arrives and quickly tallies up the sight. He screams in horror as he averts Plank's eyes from the sight of his parents' deaths and asks Ed if he really thinks this is how to show someone a good time. Ed pleads innocence and singles out Eddy as the culprit. Eddy simply grins and tells Jonny that he did indeed show Plank's parents the time of their life. He then tallies up the bill Jonny will have to pay, much to Edd's disgust. Jonny isn't willing to pay, however, as he's too angry to even consider paying for the murder of his best friend's parents. Instead, he tells Eddy that he'll be the one paying, as Plank knows people.
Later that afternoon, the Eds are stuck up a tree. Below them are several wood toughs, a sort of wood mafia if you will. While Eddy thinks their situation is stupid, Ed is thoroughly scared of the boards below them, and Edd doesn't want to anger them, as even he is scared to the point of believing they the thugs were real, though only briefly. The episode closes with the Eds in peril from those Plank knows.
Goof: When Eddy beats up Ed for sneezing the pyramid away, Eddy has four toes. Normally, all characters are shown to have three toes.
Ed's mummy name, King Tuckyershirtin, is an amalgamation of the Egyptian pharaoh Tutankhamun and the phrase "Tuck your shirt in."
This episode is the first and only appearance of Plank's parents. They do, however, appear in an Urban Ranger brochure in "The Good, The Bad and The Ed," indicating that they were repaired at some point.
Plank's mother is previously mentioned in "Ed-n-Seek."
Jimmy calls Edd by his real name at the beginning of the episode. Most of the time, Edd is called by his nickname "Double D."
Several hieroglyphics seen depict the Eds, along with Ed's various obsessions: