History Series / ItsAlwaysSunnyInPhiladelphia

*** Referenced even more often than Dennis' past addiction is Dee's past crack addiction from the same episode. It's been mentioned off-hand in nearly a half dozen episodes.

** Frank would rather hang out with a bunch of male models than female ones- additionally, he had no use for the male models, but enjoyed their company nonetheless.

** "The High School Reunion" references Mac's dog Poppins and a number of minor characters mentioned in passing in earlier seasons. Dennis ex-wife of two episodes makes an appearance, as does the guy who got a box full of hornets from Charlie for dumping the Waitress.

** Played with in the Nightman musical, which casts Dee and Dennis as lovers resulting in a kiss being modified into an erotically-charged hug.
*** Dee's also quite concerned that it makes her look like a pedophile.

** Played with in the Nightman musical, which casts Dee and Dennis as lovers.

** "The High School Reunion" references Mac's dog Poppins and features the guy who got a box full of hornets from Charlie for dumping the Waitress.
*** Really, that episode was packed wall-to-wall with references, ranging from significant (Dennis ex-wife of one episode) to minor (characters whose names were mentioned in passing once in the first season).

** Actually, he only acts that way after being accused by Mac and Charlie earlier in the episode of being creepy for only dating freshmen, and is relieved when they later give him the green light to sleep with her.

** Actually, he only acts that way after being accused by Mac and Charlie of being creepy for only dating freshmen, and is relieved when they give him the green light to sleep with her.

* UnnecessaryRoughness: In ''The Gang Gives Back''.

*** In "Fatty [=McGoo=] vs the Aluminum Monster":
--> '''Dennis:''' I'm not going to take no for an answer because I just refuse to do that because I'm a winner and winners... we don't listen to words like "no" or "don't" or "stop!" Those words are just not in our vocabulary.

*** "The Anti-Social Network" gives us this gem:
--> '''Dennis:''' I could be a man with a fistful of hammers, a trunk full of duct tape and zip ties.
*** "How Mac got Fat":
--> '''Mac:''' Dennis always tells me, "Never let someone else's resistance keep you from getting what you want".

** Another RunningGag involves [[BlackComedy Dennis being a rapist (possibly a serial killer)]]. non exhaustive list :

*** The whole [[ImpliedDeathThreat implications thing]] in "The Gang gets a Boat"
*** In "The Storm of the Century", dee accuses Dennis of raping girls in the bunker.

--> '''Mac:''' Dennis always tells me, 'Never let someone else's resistance keep you from getting what you want.

* OnlyOneName: We don't even know Mac's complete last name, much less his first. Even in the credits to "Lethal Weapon 5" he's only listed as "Mac".
** Finally revealed as of episode 7.12: [[spoiler: Ronald [=McDonald=].]]

** Finally revealed as of episode 7.12: [[spoiler: Ronald McDonald]].

* AbortedArc: The revelation that [[spoiler:Frank isn't Dee and Dennis's dad, but ''is'' Charlie's dad]] was largely dropped after season three and is rarely referenced since then. In the Christmas Special, however, [[spoiler:Charlie's glue-clouded memories imply that Frank visited his mother while she was a prostitute.]]

* EvilLawyer: Averted, in that The Lawyer is actually ''less'' manipulative and unscrupulous than The Gang...until he's pushed too far.

** In "The Gang Solves The Gas Prices":

** In "The ANTI-Social Netword," Frank calls himself Dr. Mantis Toboggan, the alias he used in "The D.E.N.N.I.S. System."

* RunningGag: Calling Dee a bird. Examples include:
** In "the Gang Gives Back," Mac says that Dee looks like Big Bird in her canary yellow pantsuit.
** In "Mac is a Serial Killer," Mac and Dennis accuse Dee of looking like Larry Bird. She counters that ''they'' look like Larry Bird, which doesn't have the same effect.
** Subverted in another episode, where Dee predicts that the guys are about to call her a bird again. Charlie retorts that he was going to say "fish" this time, because her eyes are so far apart.
** In "Who Got Dee Pregnant?", Dee gets progressively more bird-like in each retelling of the Halloween story, until Mac's version, in which she's an actual ostrich.
** In "Mac and Dennis: Manhunters", Dee, along with Charlie, becomes ravenous after eating what she thought was human meat. While eating meat sandwiches, she starts to peck at her food in large bites like a bird.

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* ShoutOut: So many that they have their [[ShoutOut/{{ptitlevmngga4bce7b}} own page]].