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. Carly dresses up as a life-size serving of tuna sushi, Sam dresses up with a hat with "hand sanitizer" on it, and Freddie dresses up as Lewbert. Once Nevel finds out, he dresses as a purple robot and give the "iCarly's" candy, which changes their voice and freaks out many people. Because of this, they angrily split up to find out who the purple robot is. Freddie successfully finds Nevel in the iCarly studio. He calls Carly and informs her it was Nevel, but Nevel's friends E-von and Dimitri force Freddie into the robot costume. Nevel silences him and magnetically seals on the head so Freddie cannot take off the costume. Meanwhile, Sam and Carly get their real voices back, and Freddie probably does too. After Freddie is sent downstairs, he is caught by Gibby and Spencer. Still silenced Freddie is unable to tell his friends that it is him in the costume not Nevel. Subsequently he is suspended and lowered twenty times in Spencer's new game, Jerk Basket, everyone thinking that it is Nevel being punished. After Carly and Sam feel they have their revenge, they realize Nevel was right behind them, happily watching Freddie get jerked. Nevel unlocks Freddie's robot head and they find an angry Freddie. Spencer tries to apologize to him, giving him a free stuffed unicorn from the Jerk Basket, only for Freddie to throw it back at him. Nevel finally feels he has had his revenge for the"iCarlys" not rising his popularity. Carly pretends she feels sorry and lets Nevel stay at the party, but she makes Sam "dangle" him above Spencer's Jerk Basket. They finally let him fall, and he collapses in a huge pile of toys and such. All the partygoers clap and cheer as Nevel is then suspended once more, as he has finally learned his lesson and he will not try to get revenge.

Megatron infuses The Nemesis w/ his own supply of Dark Energon which results in the ship taking on a life of its own with its own agenda. Meanwhile Optimus reluctantly decides to use the Spark Extractor in an attempt to bring the war to an end.

Mitch and Ray make dangerous decisions in their effort to expose Kevin Stack and the Noble Insurance conspiracy. With Stack and Alex Clark working hard to evade justice, Abby surprisingly finds herself at the center of the case.

Taskmaster goes undercover and infiltrates Peter's school to seek out Spider-Man. Spider-Man and White Tiger must put their differences aside and find a way to defeat an opponent who can mimic all of their physical abilities.

When Hank Pym's Ant-Man suit is stolen, he takes it upon himself to find the thief. Desperate to find his suit before it can put anyone in danger, Hank is pulled into a criminal underworld and caught in Crossfire's cross-hairs.

Holly and Reggie return with the results of the first viewer vote. Tom learns that Sam and Matt And Sueleen have received the lowest amount of votes. Will.i.am learns that Sophie and Joelle have received the lowest amount of votes. Lana Del Rey performs live on stage. Tom elects to save Matt And Sueleen whilst Will.i.am saves Joelle.

Vera investigates the case of a murdered social worked named Jenny Lister, who was universally considered to have been principled and popular. However, in an overworked and understaffed social work system, a notorious case involving the death of a child seems to hold the key to solving the killing. As Vera pursues the truth, she discovers the real secret at the heart of Jenny's death - and the killer who will stop at nothing to keep it hidden

One of Delaney's patients, Eve Gilston, is discovered dead in her bed. The coroner's verdict is sudden arrhythmic death syndrome but Delaney is not convinced and gets Leo to investigate. Suspicion soon falls on Eve's dad Anthony, who lost the family fortune, and his wife Beth.