- Actor Allusion:
- Wilbur Nelson who appeared in the "American the Beautiful" episode was voiced by Alan Young, who previously played two other characters sharing the first name: Main character Wilbur Post from Mister Ed and Wilbur Bowser in an episode of Encounter.
- Duckman is said to have had a relationship with a Seinfeld-obsessed blind woman who thought he was Jason Alexander in a duck suit. As a Brick Joke, 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") King Chicken proposes to Bernice, asking "In the movie Clue, what was your favorite ending: A, B, or C?" to determine if they're truly compatible.note
- "The One with Lisa Kudrow in a Small Role" is a reference to her show's Idiosyncratic Episode Naming.
- Creator's Apathy: Jason Alexander only took the part because he assumed his role would have been a one-off thing, so he did a voice that he thought would be fine for a one time role. However he subverted this trope when he grew to enjoy the show and his character, but nearly damaged his voice from trying to do the voice so much.
- Cross-Dressing Voices:
- Brian Doyle-Murray 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.
- The Danza: Ben Stein had a recurring role as a psychiatrist named...Ben Stein.
- Keep Circulating the Tapes:
- Not the show itself, but the Licensed Game Duckman: The Graphic Adventures of a Private Dick had very limited distribution and no rerelease, although Devolver Digital did express interest in possibly re-releasing it.
- Played straighter with several episodes of the show that featured copyrighted music, which were either edited or had said music substituted on the DVD release.
- Playing Against Type: 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... the same people who created the Nicktoons Rugrats, The Wild Thornberrys and As Told by Ginger?! note
- The Other Darrin:
- 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, who is bether known for on the Winnie-the-Pooh franchise as Gopher and Timon & Pumbaa as Zazu. This is because the game had so much more dialogue to record than a typical episode of the show, and Jason was concerned that he would blow out his vocal cords from all the extra work.
- Recursive Adaptation: The animated series was adapted from an underground comic one-shot published by Dark Horse Comics and received its own short-lived Comic-Book Adaptation consisting of a main series lasting five issues as well as a three-issue miniseries titled The Mob Frog Saga.
- Screwed by the Network: 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?
- What Could Have Been: In the original draft, Duckman and Bernice were actually written as husband and wife, with Duckman as the Henpecked Husband. 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.
- The Wiki Rule: The Duckman Wiki.
Trivia / Duckman