However , in Season 10 , which takes place twenty years later , the events of Season 9 are ret - conned out of existence .
She also reveals that Dan died from a heart attack at the end of the previous season .
In Season 10 , which takes place twenty years later , the events of Season 9 are ret - conned out of existence .
She also reveals that Dan died from a heart attack at the end of the previous season .