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Carly and Spencer are being evicted from their apartment, and the gang reminisces about their time in Bushwell Plaza. Although, their memories may not be quite how we remember them.

One Direction has accepted an invitation to perform on iCarly. Band member Harry becomes sick and Carly dotes over him. Realizing Harry is playing sick for the attention, they hatch a plan to get him back in the group by telling him Gibby has become their newest band member. Meanwhile, Spencer becomes a personal trainer and gives a bratty girl a makeover.

Sam and Gibby secretly operate a restaurant in the basement at school, while Spencer creates a security robot that goes haywire.

Carly, Sam, and Freddie wonder why people can't celebrate Halloween more than once a year. They decide to celebrate it halfway through the year as well creating a new holiday termed "Halfoween" and have a party.

When Freddie gets a new job at the Pear Store, Sam, who is employed with him, accidentally ruins it. Meanwhile, Spencer makes a fire for the 18th time and because of their tiredness, the fire department is done with the Shays and to apologize, Spencer brings a batch of brownies to the station. Unfortunately, the vengeful staff makes him volunteer at the fire station, which leads to another fire, this time at the station. Also, Carly meets a boy at the the Pear Store named Trey and becomes obsessed to get him to ask her out.

After Spencer's arch-nemesis Chuck pulls his latest prank on him and steals his clothes, Spencer finally gets rid of his nemesis by getting Chuck sent to military school. However, this causes Chuck's younger brother Chip to hate Spencer and terrorize him more than Chuck did. Meanwhile, Gibby buys a Galaxy Wars toy phaser and becomes depressed when Sam accidentally breaks it while beating up a bully.

The iCarly Crew performs sketches on their show that spoof those on "Late Night with Jimmy Fallon," which the host finds so impressive, that he invites them on his show for a rare live performance. Thanks to some of Gibby's usual misfortune however, the cast of both shows almost gets in trouble.

When Carly bans T-Bo from the loft, he retaliates by not letting Carly into the Groovy Smoothie. Meanwhile, Freddie and Gibby discover being in a band has many perks... and a few drawbacks.

The iCarly crew tries to find an adult friend for Spencer.

Sam's friend gets out of juvy and Sam warns everyone to stay away, but Carly doesn't listen and finds herself in over her head. Back at the loft, Spencer finds a pair of night vision goggles.

When Sam learns her Mom is in a Vegas jail, the gang decides to gather their most prized possessions, drive to Vegas and pawn their stuff to make enough money to bail her out.

When Sam's laptop gets stolen, the iCarly gang tries to help track down the thief. Meanwhile, Spencer can't visit his favorite arcade unless he's accompanied by a child. His luck turns when Guppy needs a babysitter.

Carly is sad when her father cannot escort her to a military dance. Sam and Spencer fix a motorcycle. Gibby gets his head stuck in an "artificial head machine" (because he sold his first one at the pawn shop). Freddie gets a new phone.