The evidence that Bart Bass is back to "Gossip Girl" is released. The character who got involved in a limo accident in the second season and died instantly will show his face again, most likely as a hallucination of his son Chuck.
The re-appearance is scheduled for the upcoming episode "The Debarted" which airs on Monday, December 7. It is the anniversary of Bart's death and Chuck wrestles with an issue from the past and a serious car accident rocks the Upper East Side. The one involved in a car accident would be Blake Lively's Serena.
The CW has also released a clip that shows Chuck being in denial that it was his father's death anniversary. Blair who sees him through could detect his sadness but Chuck chooses to tend a business instead of grief in private.