Spaleb

Spaleb is the friendship between Spencer Hastings and Caleb Rivers. For most of the series they aren't that close; only acquainted because of the fact that he's Hanna's boyfriend and their computer wiz when it comes to cracking A|A's codes, but in Season 3, especially the episode Stolen Kisses, their relationship grows and they become friends.

Season 3
Spencer and Caleb are mildly acquainted during the first few episodes of the season but then grow closer when Spencer asks him for help in breaking into Maya's website in Stolen Kisses. Spencer is having trouble figuring out the password and although he and Hanna are broken up, Spencer asks him for help as a last resort. Caleb tells Spencer how he gets into websites; it's looking for an open window in a locked house, almost like a burglary. He eventually gets into the website and an elated Spencer celebrates with him and they hug.