Together with his chinchilla companion Skillet, Fitz begins to recover suppressed memories that he once had a wife and a child who have now vanished.

Maiellaro cast people around his office for the characters, starring himself as the protagonist and Nine Pound Hammer vocalist Scott Luallen as the voice of Roostre; the band also performs the opening theme.

The show employs a serial format, and its ongoing storyline developed from absurdist comedy to include mystery and thriller elements.

Fitz suspects there is a sinister conspiracy involving fields of "asprind" pills beneath the city, and Shark (Adam Reed), Clock, and Rectangular Businessman's (Kurt Soccolich) attempt to control the nature of time and reality.

Fitz and Skillet receive help from Liquor (Matt Harrigan), Roostre (Scott Luallen), Peanut Cop (Nick Weidenfeld) and others as they engage in gun battles, blow things up, and try to understand cryptic hints.

The show also sometimes contains surreal "subliminal" images that flash across the screen during key plot moments, including skulls, mustached snake beasts and people screaming.

Fitz, now with a mustache and suffering from amnesia, is shown to be living in a new city during an unspecified amount of time after the original finale.

He jokingly stated that they accepted it after claiming that production costs would total "five dollars and will take some of the paper sitting in the copier.

[5][9] Described as "lo-fi animation",[7] Maiellaro crudely designed the characters as a cost-cutting measure, with the exception of Amalockh, a many-armed monster summoned in the season two episode "Corndog Chronicles", which was drawn and animated by Todd Redner at the studio, and Shark, which was borrowed from the Space Ghost Coast to Coast episode "Kentucky Nightmare".

He originally only gave the scratch dialogue for the character during the production of the pilot episode but chose himself to voice Mouse regularly after hearing his lines assembled in the final cut.

[5] Nick Weidenfeld provides the voice of Peanut Cop; Melissa Warrenburg portrays an annoying woman in a green sweater, who Maiellaro dubs "Robogirl".

Vocalist of Nine Pound Hammer Scott Luallen voices Roostre; the band also composed the opening theme song for the series.

Golden Joe is voiced by Vishal Roney; after hearing his first take on the character, Maiellaro explained that he was left unable to write any of his lines.

The set was filmed with a motion control camera and was inserted with miniature explosives and smoke bombs for special effect.

[5] Swedish heavy metal band Amaranthe performed the credits theme song for the 2018 special, "Invictus".

It was later announced on September 18 of that year that the series would return for a half-hour special entitled "Invictus", which aired a month later on October 14.

[15] An Adult Swim bumper shown with the sixth installment claimed that twenty additional episodes were being produced and taunted viewers who had complained they couldn't understand the absurdist presentation.

[16] On October 14, 2018, a half-hour special titled "Invictus" premiered on TV after having been released online two days earlier.

"[21] He contrasted it with other Williams Street productions, finding it "instead unravels slowly, revealing a little bit more of what's underneath the surface while also piling on more and more questions.

[7][25] A scene from the episode "Sharktasm" is visible in Aqua Teen Hunger Force Colon Movie Film for Theaters.