Plot summary
Blair and Dan throw a salon as a way of coming out as a couple, but drama caused by their friends derail the night. Lola finds out Serena is posing as Gossip Girl but does not tell Nate, knowing he would be hurt by the revelation. Lily cuts off Rufus' debit card after she finds out he has been paying for a hotel for Ivy. It is revealed at the end that Diana is really Chuck's mother: she was too young to raise a baby and gave him to Elizabeth to look after. Title reference: The 2004 film Shaun of the Dead.
Credits
Adapted from Wikipedia contributors, Gossip Girl season 5. HTML formatting and reference markers removed.