NGTV Guide: Monday, October 12

A wedding that might not happen and a case that won’t be solved: tonight’s TV promises lots of twists and turns!

Gossip Girl – 9/8c the CW
“Rufus Getting Married” – Lily and Rufus decide to move up their wedding to the next day, but will someone or something come between them before they become man and wife? Chuck discovers a secret that Carter has been keeping from Serena. Dan and Vanessa are pulled into one of Georgina’s schemes. Blair is suspect of Bree and shares her concerns with Nate.

Castle – 10/9c ABC
“Fool Me Once” – When an Arctic explorer is killed during a polar expedition, the mysterious circumstances of his death take Castle and Beckett from the penthouses of Park Avenue to the halls of the CIA. But Castle’s delight at the case’s many twists and turns soon turns to frustration as he realizes that their elusive killer might just be fooling them all.