It appeared for a third time in iStill Psycho, where she used it to behead one of the mannequins to make it look like Gibby was sleeping so he could escape. It is also revealed in this episode that Sam never changes the butter in the butter sock.
It was mentioned in iGo One Direction, when Sam offered to use the butter sock on Harry for faking continued illness.
It appeared again in iBattle Chip, where Sam used it to beat up a bully at the Groovy Smoothie. She finally changes the butter in the sock afterwards.
Dan Schneider confirmed that the Butter Sock will appear on more episodes.
It was seen into more action in iRescue Carly, where Sam beats up a large group of delinquents by turning off the lights and swinging away. It was paired with the night vision goggles so Sam could see in the dark, and hit the bullies in the house, and she might have also meant to hit Gibby too. Sam says she uses hard butter in this episode.
In one of Sam's blog posts on icarly.com, she mentions the butter sock when she is listing things you can buy for 3 dollars. This is what she says:
"One tube sock + One stick of butter = Instant butter sock. Cheap and effective!"
The butter sock was last referenced in iGoodbye, as when Carly and Sam are signing off, Sam says to the audience "keep your sock full of butter".
It would later appear and be mentioned in Sam and Cat.The post can be viewed