Haynes left the series after the second season to work on Arrow.
After being taught by Peter Hale, Scott uses an Alpha's power to meld minds and enter Stiles' mind with Lydia.
Because Stiles is in his Pack, Scott uses his Alpha Roar, allowing Stiles to break free of the Nogitsune.
Scott is optimistic, good-natured, kind-hearted, protective and caring. Over the series he exchanges his social awkwardness and naivety for a clear sense of duty in being a burgeoning leader in the supernatural world.
Scott sees his new werewolf status as a curse and wishes to find a cure.
Scott later learns his father, Rafael is back in town something he and Melissa aren't too happy with, as he'd left the family when Scott was only a toddler.
In Season 3B, because of his Druid sacrifice, Scott now carries the burden of having a darkness around his heart like a scar.
In the Season 1 finale, Scott and Allison reaffirm their relationship after Allison finds out he's a werewolf and that his lies were to protect her.
In Season 2, despite being vehemently opposed by Allison's parents, Scott and Allison carry on their relationship in secret.
In the Season 3 premiere, Scott gets a tattoo of two bands on his upper left arm with Derek's help.