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"iGoodbye" is the hour-length series finale of iCarly. When it premiered, it hit a 1.2 rating with 6.43 million viewers, marking the series' highest rated episode in 15 months.
Carly is looking forward to going to a father-daughter Air Force dance with her dad, but when he can't make it, she becomes extremely sad. Spencer offers to take her, even canceling an important date, but Lewbert sneezes on him and causes him to get very sick, making it impossible for him to go, too. Not even Freddie and Gibby offering to take her can cheer her up since it's supposed to be a father-daughter dance. As she sits there crying, her father surprisingly comes in.
After the dance, Carly is looking forward to spending time with her dad, but he says he has to leave again the same night. Seeing how sad Carly is, he offers to take her to Italy with him. Although Carly has doubts at first, her friends and Spencer encourage her to go with him. They make a special iCarly webcast telling people they will take a break and thank all their fans for their love and support. Carly also bids goodbye to her friends and Spencer, and even shares a kiss with Freddie, before leaving for Italy with her father.
Spencer fixes a 1964 Sterling motorcycle Socko wants to give to his cousin Ryder. Sam is a big fan of the bike and helps Spencer fixing it, but when they finish it, Socko gets in a fight with Ryder and gives it to Spencer. Spencer decides to give the motorcycle to Sam.
Freddie gets a gigantic new phone from his mother and is constantly made fun of by everyone.
Gibby gets a new replica of his head, but gets stuck in the replication machine. When he gets out, the owner of the shop gives him the head replica for free and also his pet weasel, which he hates anyway.
Carly gives her final goodbyes to Spencer, and personally says goodbye to Freddie, they even have a goodbye kiss, then she goes down to have one more goodbye to Spencer, Freddie, and Gibby. Sam and Carly ride down the elevator and Sam gives Carly her remote control.
The episode ends with Carly on the plane to Italy watching some clips from previous iCarly webcasts and Sam riding off on her new motorcycle with Freddie saying "and... we're clear" as it slowly fades to black.