Gossip Girl (The CW) Returns: Monday, Jan. 5 We've seen the last of fan un-favorite Aaron Rose and Serena (Blake Lively) takes a break from her love life to bond with a new teacher. Chuck's uncle comes in town to help pick up the pieces after Bart's death. Blair receives her first "B" and tries to gain admittance to New York's most prestigious ladies club. Jenny returns to school only to find herself in battle with a new group of Mean Girls. Meanwhile, Dan learns Rufus and Lily's secret.