* ActorAllusion:
** Wilbur Nelson who appeared in the "American the Beautiful" episode was voiced by Creator/AlanYoung, who previously played two other characters sharing the first name: Main character Wilbur Post from ''Series/MisterEd'' and Wilbur Bowser in an episode of ''Encounter''.
** Duckman is said to have had a relationship with a ''Series/{{Seinfeld}}''-obsessed blind woman who thought he was Creator/JasonAlexander in a duck suit. As a BrickJoke, said woman has kidnapped Jason, who is wondering who this woman is, and why she's talking about him having a duck suit.
** In the finale ("Four Weddings Inconceivable") [[Creator/TimCurry King Chicken]] proposes to Bernice, asking "In the movie ''{{Film/Clue}}'', what was your favorite ending: A, B, or C?" to determine if they're truly compatible.[[note]]She answers "Why choose [[BetterOnDVD when the video-cassette has all three!?]]"[[/note]]
* {{Composers}}: Scott Wilk and Todd Yvega composed for all 70 episodes. Various music and songs from Frank Zappa were also used in the first two seasons.
* CrossDressingVoices: Creator/BrianDoyleMurray plays Agnes Delrooney. Amusingly, he doesn't even attempt to sound like a woman at all.
** Dana Hill (and her replacement Pat Musick) also count for the role of Charles. And E.G. Daily as Mambo.
* TheDanza: Ben Stein had a recurring role as a psychiatrist named...Ben Stein.
* KeepCirculatingTheTapes: Not the show itself, but the LicensedGame ''Duckman: The Graphic Adventures of a Private Dick'' had very limited distribution and no rerelease.
* PlayingAgainstType: Not a specific actor, but ''studio''; so this cartoon, a raunchy, crudely-drawn ''Simpsons'' clone that aired on USA Network, was brought to you by... [[Creator/KlaskyCsupo the same people]] who created the Nicktoons ''WesternAnimation/{{Rugrats}}'', ''WesternAnimation/TheWildThornberrys'' and ''WesternAnimation/AsToldByGinger''?!
* TheOtherDarrin: When Dana Hill (the original voice of Charles) died while in a diabetic coma, Pat Musick was hired to replace her.
** In ''Duckman: The Graphic Adventures of a Private Dick'', Jason Alexander is the only one who doesn't reprise his role. Instead, Duckman is voiced by Michael J. Gough.
* ScrewedByTheNetwork: While USA treated the first three seasons fairly well (even though it did air on Saturday evenings, which is when TV ratings aren't really sky-high), most of season 4 aired in the wee hours of the morning. Is it any surprise it was canceled after that?
* WhatCouldHaveBeen: In the original draft, Duckman and ''Bernice'' were actually written as husband and wife, with Duckman as the HenpeckedHusband. Beatrice wasn't his presumed deceased wife, she was originally written as his easy going sister-in-law. Beverly is actually the left over concept of Beatrice. Even when the idea was abandoned, one of the main twists that the writers were planning towards the end of the series, was to have Duckman and Bernice end up together romantically.
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