same name. The technique (not named) was used in the 1970s BBC television serial 1990. The same unnamed technique also appeared in Irving Wallace's book The Word (1972), and in the 1985 spy novel London Match by Len Deighton. A variation of the canary trap was used in the film Miami Vice, with various rendezvous dates leaked to different groups. In the third-season finale of The Mentalist, the characters use a canary trap (giving different hotel room numbers to different suspects) to uncover a mole within their agency. A similar ruse is used in the TV series Ashes to Ashes. In A Clash of Kings, the second book in the A Song of Ice and Fire series, Tyrion Lannister uses the trap to find out which member of the King's small council is reporting to his sister, the Queen Regent Cersei Lannister. To the Grand Maester Pycelle, he tells of a plot to marry his niece, Princess Myrcella, to Prince Trystane of the powerful House Martell, from Dorne. To Littlefinger, he claims he will instead send Myrcella to be raised by Lysa Arryn and married to her son Robert. To Varys, he says his plan is to send his nephew Tommen to the Martells. When Cersei confronts him, and knows only of the plan to send Myrcella to Dorne, Tyrion knows Pycelle to be the leak. This plotline is also depicted in "What Is Dead May Never Die", during the second season of Game of Thrones, the television adaptation of the books. When distributing the film Broken to friends, Trent Reznor claims that he watermarked the tapes with dropouts at certain points so that he could identify if a leak would surface. In the film The Heat starring Melissa McCarthy and Sandra Bullock, a canary trap is employed by a drug ring to decide the loyalty of a returning member who is detective Mullins' brother. In Han Solo at Stars' End, the first book in The Han Solo Adventures, the title character uses a canary trap to find a traitor and murderer among his passengers. He tells each that their target is a different planet, all false, knowing that the traitor would have learned the real destination when they killed the group's leader. See also References External links Fingerprinting gives a good overview of different kinds of canary trap techniques. EFF.org DocuColor Tracking Dot Decoding Guide How to read the