In the first part, Master Shake freezes himself in Dr. Weird's lab and awakes up nine years later disoriented and with no knowledge of the whereabouts of Frylock and Meatwad.

"Allen" is the first episode of the series to be branded under an alternative title, and the first part marks the final appearance of Dr. Weird.

The script for the beginning of the first part was read live by the main cast at Dragon*Con in 2010, months before the episode originally aired on television.

Both parts ranked #1 in their respective time slots on basic cable with all key adult demographics, and the May 29, 2011 airing was seen by 1.675 million viewers.

The newly formed "Aqua Unit Patrol Squad", a detective squad made up of Master Shake, Meatwad, and Frylock, anthropomorphic fast-food items, are under their latest investigation at an abandoned house to find out if a man is having a sexual affair with the woman they are working for.

Later, when they wake up, a construction worker, whom they believe to be the person having an affair with their client, begins to demolish the house.

He puts on a beret, a fake mustache, and a poor French accent, and walks over to the construction worker.

After nine years, Shake awakens, and sees that there was a monster named Danny in the chamber that was making love to his face on and off the entire time so he could deposit his eggs into him.

Shake goes over to his neighbor Carl's house (now repainted and with random junk in the yard) to discover that he had moved away, and instead, a man named George Lowe lives there, under the alias "Mister Beefy".

Allen says that the monitors track all bad deeds around the entire world, and when spotted the perpetrators are electrocuted, so that the Earth can remain good.

Meatwad's plan starts, with him saying tiny swears such as "doody" and "butt", while Frylock goes all out and says things like "suck my fry dick".

Shake then flicks a button which puts a shield on the tower, and Allen's father electrocutes and kills him for "his own good".

[5] The beginning script for the first part was read live by the main cast: Dana Snyder, Carey Means, and Dave Willis at the Aqua Teen Hunger Force panel at Dragon*Con in 2010, several months before the episode officially aired on television.

[6] The original American broadcast of the first part on May 8, 2011 was watched by 1.846 million viewers,[7] and ranked #1 in its time slot on basic cable with all key adult demographics and men 18–34 and 18–24.

[8] The original American broadcast of the second part the following week on May 15, 2011 was watched by 1.798 viewers,[9] and ranked #1 in its time slot on basic cable among adults 18–24, alongside the premiere of the Superjail!

[11] Both parts of "Allen" are also available in HD and SD on iTunes, the Xbox Live Marketplace, and Amazon Video.