Aqua Unit Patrol Squad 1

Master Shake destroys Meatwad's dolls with a lawnmower and Frylock promises to buy him a new one. Meatwad wants a "Jiggle Billy" doll, which costs $149.95, wiggles his hips, and comes with night-vision goggles. Frylock doesn't want to spend that kind of money on a new doll and instead buys Meatwad a "Happy Time Harry" doll, which only costs $3.99 and comes with "real dancing glitter shoes."

As soon as Meatwad takes Happy Time Harry out of his box, it becomes clear that Harry isn't all he's cracked up to be. Instead of being happy Harry is very depressed. He has bills and child support to pay and needs money, as well as an addiction to pills and an alcohol problem. His problems are all real, although Frylock refuses to believe them and gives him phony money and fake prescriptions. Meatwad finally lashes out at him for what he's putting Harry through and Frylock angrily vows to get Meatwad a new doll.

In addition to his depression Harry is suicidal and cuts himself. Shake decides to torture Meatwad by attempting to destroy yet another one of his dolls with a blowtorch. Meatwad, affected by Happy Time Harry, is unaffected despite Shake's bullying and tells Shake to get it over with. Shake continues to threaten while Harry douses himself with gasoline and orders Shake to burn him. Shocked at what he's seen, Shake runs inside to "go pray".

Frylock returns from the toy store with the Jiggle Billy doll Meatwad originally wanted and Jiggle Billy wants to have fun. However, Happy Time Harry has an effect on him as well and Jiggle Billy becomes depressed. He takes his gun outside with him and shoots his own head off. Frylock sees what Harry has caused and threatens to shoot him with Jiggle Billy's gun, but Shake decides that Harry must become "immortal".

To this effect, the Aqua Teens go to a cliff where Shake will throw Happy Time Harry off in order to make him a Highlander, like in the film and television series that followed it. Harry, however, already knows that "Highlander" is fictional and after Shake confuses it with "Braveheart", Harry again corrects him. Unamused with being shown up, Shake chucks Harry off of the cliff. Inexplicably, Shake goes down the cliff after him wanting to be a Highlander too. After briefly catching his straw on a hanging branch, the branch gives way and Shake falls down the remainder of the way.

A few weeks later Shake has partially recovered from his injuries and heads to Carl's backyard in a wheelchair with a pair of glass eyes. Frylock and Meatwad are speechless. Shake is brandishing a sword and lifts in into the air, claiming "there can be only one!" The sword is then struck by lightning and Shake falls out of the chair and bursts into flames.