Adam

Adam Apple is a major character. He was a regular character in Season 2, and later returned as a recurring character in Season 3, and a guest character in Season 4 and 6. Adam is Angie's half brother, as well as the second Mystery Character to appear on the show.

Trivia

 * The connection between Adam and Angie was always apparent on the show. The writers carefully picked out the names and actions for both characters to see if any of the fans were able to make he connection between the two before it was revealed.
 * The first clue was that both characters names began with the letter A.
 * The second clue was when Adam moved into Angie's house after she left.
 * The third clue was that each character was the first adult character Jake befriended in their respective seasons.
 * The fourth clue, and the most obscure one, was that by cutting, turning, and rearranging the letters in both "Adam" and "Angie", the names "Angie" and "Adam" could be built from both names, respectively.
 * The fifth and final clue was within their last names, Angie's being Cortland, and Adam's being Apple - a cortland is a type of apple.
 * Adam was never meant to appear outside of Season 2, and his guest appearance in the Season 6 finale. However, the writers wanted to keep the Angie mystery alive so decided to write him into several episodes in between.
 * Shares the same name with tennis coach, Adam Giradini. This was most likely a creative decision done by the writers to add more realism to the show, by giving two characters the same name - a case that would most likely happen in the real world.
 * It's a common theory between fans that Adam was originally written as Jake's father, but later had his origins changed once the fans caught on, as the writers felt it wouldn't be shocking anymore. This is mainly believed due to Adam placing pictures of Jake in his basement at the end of 2x01, which caused a buzz within the fan base who all thought that Adam would be Jake's father. The writers have denied this, saying that Adam was going to be linked to Angie all along.
 * The writers have admitted that they would have liked to see Adam back more during his appearances, and possibly coach the Glee Club again, but felt the timing wasn't right.
 * Before the Season 2 Rewrites, the writers considered having Adam be Emelia's blood brother, most likely to complement that Ryan would be getting a blood sister the next season, however, this concept was ultimately scrapped. Though the writers liked the concept of him coming to look for someone so much, that they instead decided to make him be Angie's brother.