"Robbin' Ed" is the 17th episode of Season 4 and the 94th episode of Ed, Edd n Eddy. In this episode, Captain Melonhead saves the Cul-de-Sac kids from Eddy's latest scam. Eddy doesn't like this, however, and vows to get his revenge on Captain Melonhead and his sidekick, Splinter the Wonderwood.
Eddy's newest pitch is a machine he calls the Thingamajig that spits out whatever you need, whenever you need it. He shows it off by demonstrating its myriad uses on Average Joe (Ed), who happily accepts the gifts from the machine. Once he's done, he's made believers out of his four customers, and Nazz, Jimmy, Sarah, and Rolf rush forward to buy. As soon as they're gone, however, Edd voices a concern that's been bothering him: he only built one Thingamajig, the one that Eddy is holding in his hand, but Eddy has just sold one to every kid–and none of them were the prototype. When Eddy merely snickers, Edd is hit with a terrible suspicion. He goes over to check the boxes of Thingamajigs, only to find that inside the one he opened is a bunch of light bulbs.
Of course, Edd won't stand for this, and he calls out Eddy on his villainy. Before he can rant too much, however, Eddy stuffs a sock in his friend's mouth, and the three head off to get jawbreakers. Along the way, though, Eddy runs into trouble, as a shadowy figure jumps him, steals his ill-gotten gains, and takes off. While Ed is wowed by the superhero acrobatics he just saw, and Edd is a fan of the good deed just performed, Eddy is naturally angry, and declares that he will find the thief and bring him down.
In another part of the cul-de-sac, the mysterious figure has found the kids, who have found out about the ripoff. The kids are naturally raring to get their revenge on the Ed-boys, but their anger is suddenly quelled when the shadowy figure gives them back their cash and declares that he, Captain Melonhead, will protect their allowances, no matter what. Hearing this, the kids cheer and run off with their money.
The Eds are still in the lane, considering the personality and meaning of the caped crusader who leaped into their midst when the kids enter, cheering. As the four pass, they mock Eddy for his failure to keep his money, and this is underlined by Jimmy giving Eddy his jar back, naturally without any money inside. Angry, Eddy decides that he is going to get rid of this Melonhead character once and for all, and he has a plan as to how to do it.
But how do you fight superheroes? With supervillains, of course! But to do this, the villain in this case must set a trap, and that's exactly what Eddy does, with an obviously shady store for butts. Of course, he'll need a customer, and that's where Edd comes in, brandishing a cardboard twenty-five cent piece. The acting is woefully hammy and off-cue, but even so, it looks as though Eddy has ripped off the innocent, and Captain Melonhead naturally makes the scene to stop him. Once Captain Melonhead arrives, however, Eddy laughs evilly and ducks behind the scam, ripping off his clothes and coming out as Professor Scam! Every great villain needs an escape, and Professor Scam's is his very own Professor Scam Flyer, which takes off before he can mount it. Left without a vehicle, Professor Scam's only recourse is to escape on foot into a backyard. Captain Melonhead and Splinter the Wonderwood pursue him there, but the tables are turned when the Professor suddenly leaps out from behind a door and grabs the Captain's melon mask. This isn't the game-ending maneuver Professor Scam thought it would be, however, as there are two halves to every melon, and Captain Melonhead uses both of them as a mask. Annoyed, Professor Scam brings out his Ray of Riches, but Captain Melonhead blocks it with his helmet and throws one of his Oak Tree bombs, which seems to bring the Professor to his knees in defeat. However, Professor Scam is on his knees by a garden hose, and with Splinter in easy reach, he takes the typical low road and threatens Splinter with a good soaking. As the good guy, Captain Melonhead has no recourse but to give up and admit defeat.
Professor Scam is still sticking to the genre, however, and whenever the supervillain has captured the hero, he must naturally try and put the hero in a clichéd death trap. To this end, he has enlisted his friends as henchmen called The Cents, and is having them push Ed's tub full of gravy underneath the tied-up hero and sidekick. The other kids, from Kevin to Sarah, see this, but are powerless to stop the trap as Captain Melonhead descends towards his gravy grave.
Only one man has the power to stop Professor Scam: the man we know as Average Joe! Yes, Joe pulls out the Thingamajig and uses it to free Captain Melonhead from his bonds. Without anything holding him back, Melonhead shows the Professor that when he calls down the thunder of righteousness, justice strikes like lightning!
Beaten and bruised, Professor Scam is wheeled out of the backyard by his henchmen. Of course, great villains never go away, be they Lex Luthor, Green Goblin, or the Clown Prince of Crime himself, the Joker, so of course Professor Scam will return.
But the Professor will not return today! And as Captain Melonhead starts to tell the kids, as long as he's around, he'll make sure that their allowances are protected–until he's cut off by the kids claiming that they've heard it all before and don't need to hear it again from Jonny and Plank. Of course, Jonny can understand this, and both melon-headed hero and wooden sidekick head into the sunset, ready to take down evil whenever and wherever it might rear its head.
When Eddy shows off the Thingamajig, he uses it to put a hat on Ed's head. When the kids purchase the boxes, the hat disappears.
Before Captain Melonhead steals back Eddy's profit, there are 5 quarters in the jar. However, only four kids paid for Thingamajigs. When Captain Melonhead returns the quarters, 4 can be seen in the jar.
The "butt" that Edd "purchased" from Eddy/Professor Scam can be seen on the store wall, despite Edd putting it on after obtaining it.
Eddy shoving a sock in Edd's mouth is a play on the idiom: "Put a sock in it."
When Ed and Edd wonder what the figure on the power line is, Edd asks if it is a bird. Eddy then asks if it has a quarter in its mouth. This is a reference to "Virt-Ed-Go," when a bird stole a quarter from Eddy.
This is Professor Scam's only appearance in the series. However, Captain Melonhead would later refer to Eddy as Professor Scam in the final level of Ed, Edd n Eddy - Scam of the Century.
When Eddy (as Professor Scam) describes his Professor Scam Flyer, he uses the phrase "meaner than a junkyard dog." This is a possible reference to the lyrics of the 1973 Jim Croce folk song "Bad, Bad Leroy Brown."
When the Eds first see Captain Melonhead, Ed and Edd's questions parody the introduction lines to Superman. Edd says, "Is it a bird?" Ed then says "Could be a plane."
At the beginning of the episode, Edd's script reads "Scam Script 49a." This is a reference to the episode itself, as the episode is Season 4 Episode 9a.
"Where's the cash?!?" – Eddy Please consider downloading this episode of the show in high definition from iTunes in order to support the creators' hard work.