<Tr> <Th> 126 </Th> <Td> 16 </Td> <Td> "Lockdown" </Td> <Td> Hugh Laurie </Td> <Td> Story by: Eli Attie & Peter Blake Teleplay by: Russel Friend, Garrett Lerner, Peter Blake & Eli Attie </Td> <Td> April 12, 2010 (2010 - 04 - 12) </Td> <Td> 10.80 </Td> </Tr> <Tr> <Td_colspan="7"> When the hospital is sent into lockdown mode due to a missing infant, all of the doctors must remain where they are, leaving Foreman and Taub in the file room, Wilson and Thirteen in the cafeteria playing truth or dare, House in a room with a patient (David Strathairn), and Chase with his ex-wife, Cameron, as Cuddy tries to help police locate the infant . </Td> </Tr> <Tr> <Th> 127 </Th> <Td> 17 </Td> <Td> "Knight Fall" </Td> <Td> Juan J. Campanella </Td> <Td> John C. Kelley </Td> <Td> April 19, 2010 (2010 - 04 - 19) </Td> <Td> 10.81 </Td> </Tr> <Tr> <Td_colspan="7"> <P> The diagnostics team takes on the case of a man roleplaying as a knight who collapses at the end of a duel during a Renaissance Fair, leading Foreman and Thirteen to head to the fair to investigate . Meanwhile, House learns that Wilson's newest girlfriend is his ex-wife, and tries all means to ruin the relationship in order to protect his friend from being hurt again . </P> <P> Final diagnosis: Anabolic steroid abuse accelerated by hemlock poison </P> Absent: Jennifer Morrison as Allison Cameron </Td> </Tr>

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