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`` 911 '' is the third episode of the seventh season of the police procedural television series Law & Order  : Special Victims Unit .. police procedural. police procedural. television series. television program. It originally aired on October 4 , 2005 in the United States .. The episode focuses on the search for a nine-year-old girl who claims to be locked in a room and calls the police for help .. When it becomes clear that the phone call is not what it seems , most of the detectives in the unit become suspicious of the girl 's story but Detective Olivia Benson -LRB- Mariska Hargitay -RRB- remains convinced , believing that she is a victim of child pornography .. Detective Olivia Benson. Olivia Benson. Mariska Hargitay. Mariska Hargitay. child pornography. child pornography. The episode was written by Patrick Harbinson and directed by Ted Kotcheff .. Ted Kotcheff. Ted Kotcheff. Unlike most other episodes of the series , the action takes place primarily in the police station with many scenes building suspense only by showing Detective Benson talk into a speaker phone .. Hargitay won an Emmy Award for her portrayal of Benson in this episode .. Emmy Award. Emmy Award. Three of the main cast members , Christopher Meloni , B. D. Wong , and Tamara Tunie do not appear .. Christopher Meloni. Christopher Meloni. B. D. Wong. B. D. Wong. Tamara Tunie. Tamara Tunie. In its original broadcast , `` 911 '' pulled in 16.24 million viewers and a 5.8 rating in the age 18-49 viewer demographic .