"Last Tango, Then Paris" is the 22nd and final episode of the third season of the American teen drama television series Gossip Girl.
Jenny takes a picture of Dan and Serena sleeping in the same bed and sends it to Gossip Girl, upsetting Nate when he sees it.
A week later, Nate apologizes to Dan for sending the picture to Vanessa and tells him that he and Serena are over and proceeds to have a threesome as he has taken Chuck's Black Book.
He tells them to take him to a bank and he will give them money, but they instead pull out a box from his jacket with an engagement ring in it (showing that Chuck was going to propose to Blair).
"Last Tango, Then Paris" had received mixed to positive reviews from critics and was viewed by a live audience of 1.96 million viewers.
[5] Jennifer Sankowski, from TV Guide, felt that the storyline about Serena and Dan waking up in the same bed and Jenny sending the photo had "tended to drag".
[7] Television Without Pity also included the episode in its gallery of "Season Finales 2010: The Best and Worst" and declared it one of the best, further adding that "[...]we're completely satisfied.
Throw in Chuck being mugged and left for dead in Amsterdam's red light district and Nate whoring it up and we're totally willing to take some roofies and forget the mess most of this season has been.