SpongeBob sees that Squidward is actually smiling one day at the Krusty Krab, so he and Patrick decide to spy on him and see why he is so happy. That night, Squidward goes into a strange lodge, in which SpongeBob and Patrick intrude into. Squidward puts on robes and hangs out with the other members of Cephalopod Lodge.
When SpongeBob and Patrick decide to join in the festivities, Squidward is held accountable for allowing two non-cephalopods into the lodge and is banned for life. The two attempt to apologize to the lodge owner, but this fails when Patrick says it is the owner's fault. SpongeBob and Patrick have an "initiation" on Squidward (this involves kidnapping him and forcing him to pass it), which is putting a jellyfish on your tongue and letting it sting you.
SpongeBob and Patrick then start their own club and they call it "The Feather Friends," much to the annoyance of Squidward, who begs that he wants to be allowed back into Cephalopod Lodge. SpongeBob and Patrick want to help, so they dress up as a sock monster so they can scare the members while Squidward "saves" them.
Their plan works, and Squidward is allowed back in. However, when SpongeBob and Patrick take off the sock and reveal themselves, Squidward is again kicked out. SpongeBob and Patrick decide to go back to the "their lodge" idea, but first, they need to do the "initiation" on Squidward.
I can turn into a skyscraper!
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It is mentioned that Squidward is in this mood only on the third Wednesday of each month. He is never shown to be that happy on most episodes before, telling that almost none of the previous episodes fall on the third Wednesday of any month.
If this episode premiered a day later, the airdate would have been the third Wednesday of February 2009.
Since "cephalopods" are species of squid and octopus, it is unknown if all the people in the Cephalopod Lodge are all squid, all octopus, or are both.
The initiation into the lodge involves being electrocuted by a moray eel, when, in reality, moray eels do not generate electricity.
When Squidward yells at SpongeBob, SpongeBob's nose looks similar to Squidward's nose.
It is revealed that SpongeBob was dropped on his head as a baby.
It is mentioned that according to the lodge leader, the enemies of cephalopods are sponges and starfish, which is why Squidward gets mad every time SpongeBob and Patrick show up, especially at the lodge.
It appears that Patrick would have been able to join, but he did not want to because it had nothing to offer him.
Patrick was right that it was Roger's fault because he was not watching for intruders.
Technically, it was SpongeBob and Patrick's fault, as they followed Squidward to the lodge, kicking him out.
SpongeBob's stupidity is shown again when Patrick points out the obvious and SpongeBob denies it. He also breaks in to Squidward's house even though he kicked them out and forces Squidward to join their group by kidnapping him.
In this episode, Patrick was smart about the sock that SpongeBob talked about.
Actually, if Squidward hadn't talked to SpongeBob and Patrick, he would have still been in the club.
No female cephalopods appear in this episode.
Running Gag: Squidward getting kicked out of the lodge, Patrick forcing Squidward to join their lodge.
This is the third time more than one of Squidward's kind is shown, the first is in "Squidville," the second is in "Ditchin'," and the fourth is in "Sharks vs. Pods."
In "Squidville," all the Cephalopods look like Squidward. However in this episode, there were different types. There may be different breeds or even species.
This episode premiered eight years after the premiere of "Wormy" and "Patty Hype."
Brother Roger's name may be a reference to Squidward's voice actor, Rodger Bumpass.
The initiation ritual and secret nature of the Cephalopod Lodge is similar to that of the Masons. The Lodge's appearance (a pyramid with an eye, which also appears on the robes) is very similar to the All-Seeing Eye, which is often mistakenly considered an Illuminati symbol. This is also the only episode where a parody of freemasonry is showed.
The music that plays when SpongeBob puts on his flower camouflage suit is very similar to the song "Wasting My Hate" by Metallica, off their 1996 album Load.
This episode has similarities with The Simpsons episode, Homer the Great, in which Homer joins a group called the Stonecutters, which also parodied the Freemasons and the common perception of the Illuminati.
When Roger was talking to Squidward in the Krusty Krab, he is green. However, when he is at the Cephalopod Lodge, he is blue.
This might be explained by the fact that it was night instead of day in the later scene.
When Squidward sneaks out of his house, Patrick's House disappears.
When Squidward is putting back on his shirt, his underwear is still on. However, this was right after Roger ripped off his underwear. It disappears when Squidward is wearing his shirt.
When Squidward is in his house the next morning (after his tongue got shocked by the jellyfish), his tongue sticks out on the left side and it's covered in three jellyfish stings but when he opens his door, his tongue is normal for the rest of the scene.
When Squidward rips off the feather friends’ suit, the feet are still on, but when they zoom in and then out again, the feet are gone.
After SpongeBob and Patrick, inside the giant tube sock, tell Squidward "Just give us 5 minutes and then do your stuff," when they exit the scene, SpongeBob's footsteps can be heard, although, Patrick was the one walking and SpongeBob was on top of inside the sock.
When Squidward first enters the lodge, he enters a large room, but when he saves them from the "eel," it is some kind of corridor.