* EditedForSyndication: The syndicated versions removed the pre-opening credits sequence of James Earl Jones narrating about the four main characters; they were cut for time. These were unfortunately the versions included on the initial Anchor Bay releases, but luckily these intros were restored for the Creator/MillCreekEntertainment re-releases.
* ExecutiveMeddling: The reason for the generally despised Super Bowl episode centered on [[GreenSkinnedSpaceBabe beautiful aliens (played by models)]] trying to TakeOverTheWorld. [[CreatorBacklash Even the people who worked on the show badmouth it in the DVD commentary]].
* HeyItsThatGuy: A number of these happen in retrospect.
** A young [[{{WizardsofWaverlyPlace}} Jerry Russo]] studied physics at Pendelton before managing the Waverly Sub Station.
** It's a wee young [[{{Brick}} Brendan Frye]]. Or possibly [[{{Inception}} Arthur]].
*** [[Film/GIJoeTheRiseOfCobra Cobra!]]
** Creator/JohnLithgow's later roles include [[WesternAnimation/{{Shrek}}Lord Farquaad]] and [[Series/{{Dexter}} Arthur Mitchell]]. The latter was especially jarring to any younger viewers who didn't know that he's an AMAZING dramatic actor.
** [[Series/{{Seinfeld}} Newman]], [[Film/{{Jurassic Park}} Nedry]] and [[WesternAnimation/ToyStory2 Al]] all appear in here as well
*** Don't forget [[BuzzLightyearOfStarCommand Zurg]] too.
** Harry was kidnapped by [[WesternAnimation/{{TheSimpsons}} Troy McClure/Lionel Hutz]]
** One episode has [[Series/{{MASH}} Col. Potter]] guest starring.
** In one episode, Dick and Mary go out with [[Series/StarTrekTheNextGeneration Commander Riker]] and his wife [[Series/GeneralHospital Laura Spencer]]. (Jonathan Frakes and Genie Francis are [[RealLifeRelative married in real life]].)
** The boy with the frisbee from "[=Y2dicK=]" is {{Lizzie McGuire}}'s little brother.
** And, of course, some may know Mary better as [[SaturdayNightLive "Jane, you ignorant slut"]].
** In the season 4 finale, [[Series/BreakingBad Aaron Paul]] shows up as a random high school student at Tommy's prom.
** In 5x03, [[Series/BreakingBad Saul Goodman]] shows up as a sleazy insurance salesman.
** In a season 4 episode, [[Series/BreakingBad Walter White]] is an entertainer on a riverboat.
* HeyItsThatVoice: [[MegasXLR Coop]] is failing Professor Solomon's Physics class (and is anyone really surprised?)!
** No worries- he goes on to [[WizardsOfWaverlyPlace marry]] [[JusticeLeague Hawkgirl]].
* RealLifeRelative:
** "Auto Eurodicka" sees members of Bug's family played by David [=DeLuise=]'s father Dom and brothers Michael and Peter.
** Leon is played by John Lithgow's son, Ian.
* ScrewedByTheNetwork: Do you know how many times NBC changed the series' timeslot? Fifteen times... at least. Coupled with often being scheduled against stiff competition, making it to six seasons was quite an accomplishment. NBC particularly hurt the show with its scheduling choices in Season 6 - with ratings taking such a hit that production knew they wouldn't be back for a seventh.
* This show and ''Series/ThirtyRock'' share more than similar titles:
** Tracy Morgan appeared in a ''3rd Rock'' episode ("Dick'll Take Manhattan") and John Lithgow appeared in a ''30 Rock'' episode ("Goodbye, My Friend"). Both were playing themselves.
** Their connections to ''SaturdayNightLive'' are inverted. ''3rd Rock'' was created by two ''SNL'' alums and has one ''SNL'' alum in the main cast. ''30 Rock'' was created by one ''SNL'' alum and has two ''SNL'' alums in the main cast.
** Elaine Stritch plays the overbearing mother of a main character on both shows. Jan Hooks has a RecurringCharacter on both shows as well.
** In the film ''TheFlintstones In Viva Rock Vegas'', Wilma is played by a ''3rd Rock'' regular (Kristen Johnston) and Betty is played by a (future) ''30 Rock'' regular (Jane Krakowski).
** When ''30 Rock'' first premiered, it aired alongside John Lithgow's short-lived sitcom ''Twenty Good Years''.
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