<Tr> <Td_colspan="8"> Stabler and Beck handle a case in which the attacker (Michael Kelly) seems to be coming back to rape his victims again and again . They disagree on how to help a woman (Marin Ireland) who is living in fear . The detectives soon discover that his plan is to impregnate selected women . In order to put him away, they compel a pregnant woman (Kerry O'Malley) to undergo chorionic villus sampling even though her husband (Matthew Arkin) wishes to remain ignorant to the fact that he is not the father . </Td> </Tr> <Tr> <Th> 167 </Th> <Td> 6 </Td> <Td> "Infiltrated" </Td> <Td> David Platt </Td> <Td> Dawn DeNoon </Td> <Td> October 31, 2006 (2006 - 10 - 31) </Td> <Td> 0809 </Td> <Td> 13.36 </Td> </Tr> <Tr> <Td_colspan="8"> Casey Novak is forced to get Olivia Benson, still undercover with the FBI, to come back to New York to testify on behalf of a woman who was raped in a bank . While undercover with an Oregon environmental group, she and her group members (Maria Thayer and Chris Bowers) are injured by an overzealous deputy sheriff (Steven Rishard) and charged with assault . She is eventually released but is questioned about her group's involvement with a murder . She then sets out to clear her group's name and investigates the murdered man . Despite the efforts of his widow (Debra Jo Rupp) trying to shield her daughter from the truth, Benson learns that he was a pedophile with a room under his garage that he used for kidnapping . The local sheriff (Charles Martin Smith) finds two sets of prints at the scene, the murdered man's and those of a ten - year - old girl (Molly Camp) who went missing seven years ago . Benson's case agent (Vincent Spano) tells her that she is indeed spending time with harmless activists and that her undercover work is no longer needed . As she is still unaware of the urgency of Novak's case, she decides to stay and help the FBI find the missing girl . In the end, Benson finds the girl, who had developed Stockholm syndrome and makes it back to New York just in time to testify . </Td> </Tr> <Tr> <Th> 168 </Th> <Td> 7 </Td> <Td> "Underbelly" </Td> <Td> Jonathan Kaplan </Td> <Td> Amanda Green </Td> <Td> November 14, 2006 (2006 - 11 - 14) </Td> <Td> 0807 </Td> <Td> 14.76 </Td> </Tr>

When does olivia come back to svu in season 8
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