S.H.U.S.H. is on the trail of a notorious jewel thief who has come to St. Canard, but as they only have the thief's double identity as a Quackerware salesman to go on, they believe Herb Muddlefoot to be the culprit. Drake tries to protect his neighbour by joining in on Herb's Quackerware sales route, all while Gryzlikoff tries to investigate on his own.
This episode contains examples of the following tropes:
- Animate Inanimate Objects: Weasel Lowman somehow built a machine that can transform Quackerware into his minions.
- Arson, Murder, and Jaywalking: When Darkwing threatens to blast Weasel, the reasons he lists are larceny, kidnapping, and doing a bad impression of Herb.Lowman: I thought I was pretty good.
- Berserk Button: Herb, of all characters, is shown to have one when facing off against evil salesman Weasel Loman.Weasel: Quackerware's a tenth rate product! It took me to realize its true potential!
Herb: You can disgrace yourself, and you can disgrace me, Weasel. But when you start messin' with Quackerware, that's it for old Herb Muddlefoot! Come on! - …But He Sounds Handsome: In the last scene, Darkwing doesn't miss the chance to call Drake Mallard a "good-looking cuss" when talking to Herb.
- Does This Remind You of Anything?: When Herb and Loman, two rather large men, begin fighting, they stand in a circle and go at each other like sumo wrestlers.Darkwing Duck: Looks like two beach balls with a grudge.
- Exact Words: When Darkwing tells Weasel to let Herb go, he obliges... by tossing him into a Quackerware.Darkwing: I meant, put him down safely!
- Freeze Ray: Gryzlikoff's surveillance van, disguised as an ice cream truck, packs a blaster than can freeze anything solid. Unfortunately, when Darkwing tries to zap Weasel's van, he misses and hits the street, causing Gryzlikoff's truck to spin out of control.
- Gold Makes Everything Shiny: As a part of his plan, Loman paints his second batch of Quackerware gold to sell them to mansions.
- Humble Hero: Herb has won the prize as "Salesman of The Year" and "Salesman of The Decade", are beloved by the housewives, even Darkwing and Launchpad are impressed, but Herb bashfully waves it off as it is nothing as long as his customers are happy.
- Inspector Javert: When Darkwing is reluctant to investigate Herb, J. Gander assigns Gryzlikoff to the case, who intends to go after him with guns blazing. To protect Herb and find out who the real culprit is, Darkwing has to join him on his sales route under the pretense that he wants to be a Quackerware salesman.
- Latex Perfection: Loman has an impressive mask that looks exactly like Herb that he uses as a disguise. Thanks to having a similar build to Herb, he can look like his doppelganger.
- O.O.C. Is Serious Business: J. Gander is taken aback when Darkwing Duck, who normally jumps at any chance to take down a villain, bluntly refuses to take the case implicating Herb.
- Pokémon Speak: The only thing the living Quackerware can say is "Sir!", likely referring to their master, Weasel Lowman.
- Pop-Culture Pun Episode Title: A reference of The Merchant of Venice.
- Reasonable Authority Figure: Seeing that Drake really is trying as good as he can to be a salesman despite failing, Herb is willing to give him a chance, even tell Drake to ask him for help if he gets stuck.
- Serious Business: Herb really takes his Quackerware selling seriously, so much that he's ticked off when he finds out that Weasel has been turning it into living robotic thieves.
- Shout-Out: The villain is named Weasel Loman. He also has a Richard Nixon-like voice.
