<Tr> <Td> ← Previous "Love Eternal" </Td> <Td> Next →--</Td> </Tr> <Tr> <Td_colspan="2"> Law & Order (season 20) List of Law & Order episodes </Td> </Tr> <P> "Rubber Room" is the twenty - third episode of the twentieth season and the series finale of NBC's long - running legal drama Law & Order . In the episode, Detectives Lupo and Bernard search for an anonymous blogger who has posted plans to blow up a school, while Lt. Van Buren struggles to keep her personal issues private . </P> <P> The episode was written and directed by René Balcer and received positive reviews from critics and a 1.9 rating in the 18 - 49 demographic in its original American broadcast . </P>

What happened on the last episode of law and order