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The Time Machine is a time machine only found in "SB-129". When Squidward ended up being frozen in a block of ice in the Krusty Krab's freezer for over 2000 years, he discovers the machine with the help of SpongeTron, Spongebob's robotic descendant.
The Time Machine initially appears to be a room with a grayish-chrome door. When entered, though, the room has blue-striped pinkish wallpaper, a lamp light, green cieling, and interestingly, a lever with the words "Future" and 'Past" When the lever is pulled in a direction, it sends the user to the future or past, respectively. When the person travels through time, green flashing lights appear the moment they disappear.
When the time machine warps to a new time period, it is actually separated from the wall. Spiked edges surround the room and wires appear at the back of it.
Role in the episode
When Squidward asks SpongeTron and his clones for a way to
return to his own time period, the robot leads Squidward to the time machine. At first, Squidward enters a "can-opener room", slicing his skin into rolls. The reason that this happens was the fact that Spongetron pointed him to the LEFT, not the RIGHT. Spongetron then leads squidward to the right direction towards the time machine. When he enters, Squidward decides to flick the switch to the past, ending up in the Prehistoric Era.
Once there, Squidward meets the primitive ancestors of Spongebob and Patrick; Primitive Sponge and Primitive Star. Their meeting is somewhat calm, but Squidward quickly gets annoyed at them after they keep on getting stung by a jellyfish (willingly). He teaches the duo the practice of jellyfishing so that they stop hurting themselves.
When Squidward finally gets his alone time he desired, he starts to play the clarinet, but Primitive Sponge and Primitive Star become territorial. They chase Squidward down to possibly attack him, so Squidward frantically runs bakc into the time machine. In a frenzy, Squidward accidentally breaks the lever off of the switch, causing it to say the word "Loser!", and then the time machine warps from the prehistoric era.
The time machine malfunctions, and weird things start to happen. The time machine ends up in an computer area with random things flying across the screen like "Asparagus" and "Huh". Then the time machine folds itself like paper while flashing in different colors and finally disappears altogether. This is where the climax occurs.
Squidward finds himself in an empty white void called "Nowhere"; nothing appears to exist here but colored squares that can be lifted when touched. Another thing to note about this strange place is that every sound that is emitted is echoed, like Squidward's footsteps. At first, Squidward finally feels that no one can bother him as nobody can be found here. He then lies down and says "I have finally found a place where I can be all........................ alone."
Upon saying "alone", speech bubbles containing the word randomly appear. Weird voices then start to echo "alone" in rather disturbing ways. After hearing the voices, Squidward becomes hysterical and searches for a way out of Nowhere. First, he sprints across the screen around 4 times, but realizes that by doing that, he just ends up back into the same spot as before. He then jumps around crazily, but luckily he ends up back in the time machine by breaking the floor.
When he enters the time machinem Squidward begins to admit that he misses Bikini Bottom, and even SpongeBob. Upon saying "SpongeBob", the time machine warps him back to the present time period.
Squidward feels happy to meet Spongebob and Patrick, summarizing his trip to them. Spongebob and Patrick then ask if Squidward finally wants to go jelly-fishing with the him, but then Squidward yells at them, asking them "What kind of barnacle-head invented that game anyway?". Spongebob and Patrick tell Squidward that in fact he was the one who did, and begin to laugh and chuckle. Squidward then says he's "going back", ending the episode.
Despite being very technologically advanced, the time machine appears to be a small room with a control switch.
When Patron, Patrick's robotic descendant, teleports inside of the futuristic Krusty Krab, the animation has a similar effect like the time machine when it warps through time.
After Squidward warps to the present, the time machine stays partially out of view from the camera. But after the episode ends, the time machine is never seen or even mentioned ever again. It's unknown what become of it after that.
It is never stated who invented the time machine. It may have been SpongeTron, as he is the one who knows where the room is, but it's not confirmed.