"To the Boy in the Blue Knit Cap" is the eighth and final episode of the tenth season as well as the final episode of the American police procedural television drama series Law & Order: Criminal Intent. It first aired in the United States on the USA Network on June 26, 2011. In this episode, Detectives Robert Goren and Alexandra Eames investigate a case centered on Parker and Thomas Gaffney, a set of wealthy twins, who file a lawsuit against a social networking site due to allegations of stealing copyright claims. "To the Boy in the Blue Knit Cap" was written by Julie Martin and Chris Brancato, although uncredited, it was extensively re-written by René Balcer with Warren Leight writing the final scene of the episode, and it was directed by Jean de Segonzac. The story and the characters in the episode were highly influenced by the real-life lawsuit against Facebook made by Tyler Winklevoss and his brother Cameron Winklevoss, as well as the film adaption to the event, The Social Network. Critics reacted to the episode with mixed reception upon airing, with much criticism stemming from the cultural references and the episodic plot. Upon its original airing, "To the Boy In the Blue Knit Cap" was watched by 3.75 million viewers, and it achieved a 0.9 rating in the 18-49 demographic according to the Nielson ratings. It featured guest appearances by James Van Der Beek, Thad Luckinbill, Trent Luckinbill, and Brandon Jacobs. Plot Goren and Eames investigate when the bodies of twins Parker and Thomas Gaffney are found in the offices of popular dating website Kizmate. The Gaffneys were apparently seeking information to use in a lawsuit against Kizmate's founders, Danielle and PJ Edwards. The Gaffneys apparently had the idea for Kizmate first and asked Danielle to help code the site. Danielle claims the algorithm used on the site was one she devised herself after she met PJ and was trying to track him down, leaving a message for "the boy in the blue knit cap". No security cam footage is available. Goren thinks Thomas's body was already unconscious and Parker was trying to drag him across the floor. Parker was himself attacked while occupied with his brother's body. The twins' father says Kizmate was the twins' idea; when the site launched, they realized Danielle had stolen their idea and asked her for their share of the site's profits.