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Back to the Past
Season 7, Episode 135a
Back to the Past
Air date February 15, 2010
Written by Casey Alexander
Zeus Cervas
Dani Michaeli
Episode guide
SpongeBob's Last Stand
The Bad Guy Club for Villains

Back to the Past is a SpongeBob SquarePants episode from season seven. In this episode, SpongeBob and Patrick accidentally changes past events with Mermaid Man's time machine.



SpongeBob and Patrick are strolling through Bikini Bottom and see Mermaid Man and Barnacle Boy in the Invisible Boat Mobile, without gas. SpongeBob and Patrick push the boat over several hills. Barnacle Boy invites them into their warehouse full of memorabilia from their T.V. show. Barnacle Boy shows them a time machine which they have never used, and warn them to not use it. But Patrick mistakes it for a vending machine, and all of them are transported to 1954 when Mermaid Man and Barnacle Boy are young. They see Man Ray tormenting old Bikini Bottom. Mermaid Man and Barnacle Boy are unsuccessful at foiling Man Ray due to Patrick eating the tartar sauce they were originally going to trap him in. SpongeBob and Patrick escape old Bikini Bottom, leaving their Mermaid Man and Barnacle Boy behind. When SpongeBob and Patrick return to Bikini Bottom, it is no longer called Bikini Bottom, but Man-Ray-Opolis. They go to the Krusty Krab which now has no name. The superheroes from their time are now dead and buried inside of the restaurant. While the past superheroes now work there. Mermaid Man is the fry cook, SpongeBob's position, and Barnacle Boy is the cashier, Squidward's position. They go back to stop Patrick from eating the tartar sauce, but the heroes who were sent by accident believe they are impostors. The Mermaid Men fight which creates the perfect distraction for Man Ray. The young Mermaid Man and Barnacle Boy attempt to foil Man Ray with the tartar sauce, but the two Patricks end up eating it. Another warehouse appears. SpongeBob and Patrick from a different time period emerge from the warehouse screaming "Patrick, don't eat the tartar sauce!" Another warehouse appears above of Man Ray and out fall SpongeBob and Patrick. Yet another one appears with SpongeBob saying to Patrick "I told you we had to go back further!" Another one pops to Man Ray's left with Mermaid Man and Barnacle Boy leaping out of it exclaiming " Up, up and away!" They both fall headfirst into the ground. Another one appears above of the previous warehouse with the superheroes. SpongeBob and Patrick appear and throw a batch of tartar sauce over the fallen superheroes from the previous warehouse. Another one appears next to the pair of warehouses. Man Ray flies out of it, destroys it, says, "I took care of your blasted time machine!" and leaves. All of the warehouses appearing in random locations confuses Man Ray. Man Ray sits down on a log and thinks about what is happening, but gets arrested by the superheroes. Then all of a sudden many warehouses appear all over the planet, all of them containing multiple copies of SpongeBob and Patrick.


  • In this episode, Barnacle Boy refers to the Invisible Boat Mobile as "The Invisiboat".
  • "Back to the Past" aired in the UK on April 2, 2010.
  • Mermaid Man & Barnacle Boy's time machine is a parody of the Doctor Who time machine, the TARDIS.
  • The original past when Man Ray is brought to justice via tarter sauce can be referenced to Mermaid Man and Barnacle Boy III where Man Ray is shown to be entombed in frozen tarter sauce.
  • This episode could possibly explain why Manray has turned good in Mermaid Man and Barnacle Boy III, but is evil in most other episodes after it. As they altered the future, so Manray was never frozen in Tartar sauce to later be awakened, and turn good. Instead he went straight to jail. Thus he remained evil.
  • This episode is just one day short of premering an exact year after Slide Whistle Stooges.
  • Patrick mentions Crunchity Munchities from Greasy Buffoons.
  • Running Gag: Whenever there was tartar sauce, Patrick would eat it up.
  • When tons of objects fall down on Mermaid Man, Manray's head is visible and can be seen falling down on Mermaid Man's head.
  • SpongeBob said that the population of Bikini Bottom was 38 in their time, but in WhoBob WhatPants It was 538. And in Patty Hype, SpongeBob served 46,853 customers. This is a goof.
  • The title card for this episode is similar to those of "Nasty Patty" and "Patty Caper."
  • This is the 2nd time someone travels through time. The 1st was Squidward on SB-129.
  • This is the only time Squilliam appears without Squidward.
  • The younger MM&BB was seen on Mermaidman & Baracle Boy (episode).
  • This episode must be before Mermaid Man and Barnacle Boy III.
  • The first time SpongeBob and Patrick got to the past it must be around the 1800s. But it said 38 people lived in Bikini Bottom, and it's possible that Person 39 is SpongeBob, so it could've been in early 1986.
  • Man-Ray-Opolis is a play on George Orwell's "1984". The poster featuring Manray's eyes watching SpongeBob and Patrick with the words, "He's watching you" is a reference to 1984's famous phrase, "Big Brother is watching you".
  • Young Mermaid Man and Barnacle Boy were played by Adam West and Burt Ward, who played Batman and Robin in the 1966-68 live-action Batman TV series.

APM Music Identification[]

Original Music[]

  • Steel Sting - Patrick ate all the tarter sauce. {Jeremy Wakefield}
  • Vibe Sting - "Curious." {Nicholas Carr}
  • Drowsy Reef - "I lost the desire and the physique to fight long ago." {Jeremy Wakefield and Sage Guyton}
  • Slide Whistle Song - A bunch of warehouses confuse Man Ray. {Nicholas Carr, Sage Guyton, and Jeremy Wakefield}

​APM Music[]