* ActorAllusion: Jack tells the story of when he and Whit, then voiced by Hal Smith, visited Bath, North Carolina, where they met [[Series/TheAndyGriffithShow Uncle Randy and his Deputy Arny.]]
** In "The One About Trust", Margaret Faye incorrectly guesses Connie's name as [[Creator/KatieLeigh "Katie"]].
** In "The Malted Milkball Falcon", after an all night rocking chair competition, Emily Jones says "The [[VideoGame/MetalGearSolid4 sunrise...]] It's so [[http://www.youtube.com/watch?v=lO8jcem2qC4#t=06m14s pretty...]]"
* AdoredByTheNetwork: While the AnimatedAdaptation is syndicated to many stations, [=FamilyNet=] seems to keep it on their Saturday morning roster. When there is only one toon on the line-up, odds are it's usually this.
** [=FamilyNet=] dropped the show in the 2011-2012 season and replaced it (in the 'sole animated show' placement) with ''Monsters and Pirates''.
*** And yet they still air the ChristmasEpisode the Saturday before Christmas!
* TheCastShowoff: Some recent Odyssey episodes feature Eugene Meltsner playing the ukelele (based on voice actor Will Ryan's skill at playing the instrument).
** Also, [[WesternAnimation/TheLandBeforeTime Aria Curzon]], voice of Mandy Straussberg showed off her singing talents on a few episodes.
* ContestWinnerCameo: How Shona Kennedy was cast as Connie's half-sister Jules. As part of Adventures in Odyssey's 25th anniversary in 2012; the series held a "Get in the Show" contest to find a voice for a new character. Kennedy won the contest and would debut as Jules Kendall in the episode "Life Expectancy: Part 2", being received well enough for Jules to become a recurring character.
* TheDanza: Early Odyssey character Ann Jacobs was voiced by Ann Ault.
** Another early character, Jessie Morales, was voiced by Erin Morales.
* DawsonCasting: A number of child characters are voiced by adults (as opposed to child actors aging faster than their characters):
** Creator/KatieLeigh as Connie Kendall.
** Middle-aged Steve Burns as both teenage bully Rodney Rathbone and Connie's love interest Robert Mitchell.
** 30-year-old Nathan Carlson as Jimmy Barclay's cousin Len in "Castles and Cauldrons"
** Dick Beals as Nicky Adamsworth in "Eugene's Dilemma" (Beals had a glandular problem that prevented him from ever going through puberty)
** Christina Puccelli as Emily Jones
** Both Hope Levy and Kelly Stables as Olivia Parker
* {{Defictionalization}}: There is a real Whit's End at the Focus on the Family headquarters.
* MissingEpisode: A few early shows starring a bumbling police officer (named Officer Harley) were pulled and re-recorded when parents complained that he gave children the wrong impression of authority figures. Officer Harley's only appearance now is at the end of the episode where the Barclays get robbed and the {{Flashback}} about how Whit acquired Whit's End.
** There are a few episodes from Spring 2000 (the latter half of the infamous [[DorkAge split era]]) that were last aired in 2003 for various reasons: "The Telltale Cat" was seen as too violent, "B-TV: Grace" had a skit that was deemed offensive to the Amish, "Sticks and Stones" might have given kids too many ideas for insults, and [[ArsonMurderAndJaywalking "Career Moves" was just a really weak episode]].
* FandomNod: The various theories about AREM's identity that Alex, Cal, and Sarah come up with in "Grand Opening, Part 1" are all references to the theories fans were tossing around online.
* OldShame: Katie Leigh (voice actress for Connie) played a major character from the ''Dungeons & Dragons'' [[WesternAnimation/DungeonsAndDragons animated series]], a fact which got a bit awkward after AIO did an episode condemning the role-playing game, "Castles and Cauldrons". Of course, considering how much fantasy voice-acting there is to do, most of the cast probably view that episode as OldShame themselves. In any case, when the D&D came out on DVD in 2006, Leigh was the only member of the cast to reprise her role as Sheila for (appropriately enough) the radio play of "[[TheResolutionWillNotBeTelevised Requiem]]". In earlier interviews she said she'd be quite happy to do the role again.
** Even before the animated series ended production, it was pretty clear that the writers were somewhat embarrassed by it and its noticeable difference in tone and writing. "A Day In The Life" was a partly a satirization of the changes in the animated series, wherein a Hollywood studio comes to make a movie about Odyssey and keeps making ridiculously over-the-top changes to make the movie more interesting until [[InNameOnly you can barely tell the movie's about Odyssey at all]]. "[[AprilFoolsDay I Slap Floor]]" even contained a DiscontinuityNod where ([[ItMakesSenseInContext a slightly unhinged]]) Whit draws up plans for the Strata-Flier (Whit's standard mode of transportation in the animated series) and raves about the adventures they can take in it and the people they can save. Everyone else in the room thinks Whit's being ridiculous.
--> '''Connie''': "Uh...huh."
--> '''Tom Riley''': "Maybe you should lie down, Whit."
--> '''Whit''': "Well, you'll be sorry the next time someone falls off a clock tower!"[[note]] This was something that actually happened in the animated series to Dylan.[[/note]]
** Within the radio show itself, we have the episodes that featured the klutzy police officer David Harley, who was quickly dropped when parents complained that he was giving kids a bad idea about police officers, and the episodes either went [[MissingEpisode missing]] or were either rewritten or rerecorded without Harley in them. In one case the early episode "Lights Out At Whit's End" was pulled, not just because of Harley, but because the episode was just [[BizarroEpisode too weird]], featuring little in the way of aesops (aside from a vague "it's good to spend time with your friends" moral) and ending with a random [[DancePartyEnding free-style rapping session]] that even Tom Riley and Whit take part in! The episode isn't even included in the "[[LostEpisode Lost Episodes]]" album.
* TheOtherDarrin: Whit's voice actor was replaced after his original one died. And then ''again'' after he died too.
** When Katrina's [[PutOnABus bus came in]], her actress had changed as well. She's even quieter now.
** Walker Edminston passed away before he could finish recording Bart's lines in the episode "Suspicious Finds" (wherein Bart was a major character). Bart's lines were rerecorded with another actor.
** Marvin Washington went through three different voices during his run on the show.
** All three of the Parker children have had their voices replaced once. Special notice goes to Matthew Parker; who has been voiced by three actors[[note]]original voice actor [[WesternAnimation/StevenUniverse Zach Callison]] gave way to Gunnar Sizemore before the 2014 season; with Sizemore voicing Matthew Parker for just over a year before giving way to current (as of 2016) Justin Felbinger[[/note]] in a space of roughly 2 years.
** Averted narrowly with Eugene; the writers initially thought about having Steve Bridges stand in for Will Ryan to record the message on Whit's answering machine at the end of "Exit", but decided against it and simply spliced together clips from old episodes (in similar fashion to the messages Whit left on the Whit's End answering machine during the Blackgaard arc or an earlier Novacom episode for which neither Will Ryan nor Pamela Hayden could record Eugene or Katrina).
** Vance King's voice in his debut was provided by [[Series/HannahMontana Jason]] [[Series/KickinIt Earles]], where all other appearances have sporadically voiced by either Earles or Creator/JasonMarsden.
* PlayingTheirOwnTwin: Regis and Edwin Blackgaard are both voiced by Earl Boen.
* RecycledScript: After the episodes starring the bumbling police officer Harley were pulled (parents objected because they gave children the wrong impression of authority figures), the episodes were rewritten to feature a bumbling private investigator instead.
* RomanceOnTheSet: During the early years, the character of Lucy Cunningham-Schultz was voiced by Genni Mullen, while the role of Jack Davis was played by Donald Long. Around the time their characters were phased out, Mullen and Davis ended up marrying, and when their characters appeared again in a 2008 episode shortly before the most recent {{ReTool}}, Lucy and Jack got engaged.
* TalkingToHimself:
** Walker Edminston as Tom Riley and Bart Rathbone.
** Earl Boen as Edwin Blackgaard and Dr. Regis Blackgaard (although they only ever interacted with each other in one episode).
** Steve Burns as Rodney Rathbone and Robert Mitchell.
** Corey Burton and Will Ryan have LoadsAndLoadsOfRoles, regularly playing bit characters as well as multiple recurring characters (Walter Shakespeare and Cryin' Bryan Dern for Burton, Harlow Doyle and Eugene Meltsner for Ryan).
* TechnologyMarchesOn: Hoo yeah. The show has utilized technology in every era, from dazzling arcade machines to pagers and beepers to top-of-the-line "laptop computers" and "cellular phones" to a brand-new computer having "one of those high-speed lines" to people sending "text messages" to [[BlandNameProduct [=AppleBerry=]]] smartphones. Nothing makes you feel old like having a fan question why Connie didn't just call or text Eugene or Bernard about Whit leaving on the cell phones they wouldn't have had yet in the early 1990s.
* WhatCouldHaveBeen: A lot relating to the "Darkness Before Dawn" StoryArc, as detailed in the various [[AllThereInTheManual guide books]] released over the years. Among other things, the arc was meant to be the GrandFinale of the series, and would have featured some plot elements involving Dr. Regis Blackgaard possibly making a HeelFaceTurn, [[TheAtoner Richard Maxwell]] dying, and Whit's End ''[[{{HSQ}} burning to the ground]]''. When the writers realized that they had introduced other questions along with the ones they had intended to wrap up, however,[[note]] for example, how Katrina would react to Eugene's new-found faith or whether or not [[PutOnABus Whit]] would ever return to Odyssey[[/note]] they felt that they needed to address these, and the series continues to this day.
** In the Novacom saga, the writers wanted to bring back Richard Maxwell to be the man behind AREM (a phonetic spelling of the initials "R.M."), but Maxwell's voice actor Nathan Carlson was unavailable, so Robert Mitchell was created for the role instead.
** Also in the Novacom saga, writer Marshal Younger wanted to have a scene where a farmer under the influence of the proto-Novabox goes out and shoots all of his cows; it was shot down when a sound designer protested and Paul [=McCusker=] in particular was concerned about the saga's body count, and to this day Younger considers having suggested it to be an OldShame.
** The team considered having the Straussbergs move to Chicago after Rachel and Stephen reconciled in "Life, in the Third Person, Part 2"; ultimately, they were kept in Odyssey and Mandy had two more on-air appearances before she, like the rest of the cast sans the original trio and Wooton, were phased out of the show for the relaunch.
* TheWikiRule: [[http://www.aiowiki.com/wiki/Main_Page Adventures in Odyssey Wiki]]. Notice this wiki is formatted in a style similar to [[{{Wikipedia}} The Other Wiki]].