<Tr> <Td_colspan="8"> Damon Werth, the Marine from the episode "Corporal Punishment", seeks Gibbs' help when his friend is found murdered in a dumpster . Gibbs learns from Fornell that their suspects are part of a syndicate illegally trafficking expensive car parts which the FBI has been investigating for some time . Werth and Ziva go undercover while the rest of the team hit the road to track down the ringleader of the operation and find out who was responsible for the murder of Werth's friend . </Td> </Tr> <Tr> <Th> 154 </Th> <Td> 16 </Td> <Td> "Mother's Day" </Td> <Td> Tony Wharmby </Td> <Td> Gary Glasberg & Reed Steiner </Td> <Td> March 2, 2010 (2010 - 03 - 02) </Td> <Td> 716 </Td> <Td> 19.67 </Td> </Tr> <Tr> <Td_colspan="8"> Secrets arise when Gibbs' former mother - in - law Joanne Fielding (Gena Rowlands) surfaces as a witness in a murder investigation . At first, the crime appears to be a simple robbery gone awry, but deeper investigation reveals that there's more to the story . The victim, a Navy captain, was involved with the same drug cartel that killed Gibbs' first wife and child . His mother - in - law eventually admits that she killed the captain in revenge for her daughter and granddaughter's death, and Gibbs' tells her he murdered their real killer as well . Despite the confession, Gibbs cannot bring himself to arrest his own mother - in - law . He convinces Allison Hart to defend her, and then purposely makes crucial legal mistakes on arresting her (not reading her her rights, questioning her without legal counsel) so that Hart is forced to prevent the arrest . Vance later informs the team that the case is closed without giving an explanation . </Td> </Tr> <Tr> <Th> 155 </Th> <Td> 17 </Td> <Td> "Double Identity" </Td> <Td> Mark Horowitz </Td> <Td> George Schenck & Frank Cardea </Td> <Td> March 9, 2010 (2010 - 03 - 09) </Td> <Td> 717 </Td> <Td> 19.58 </Td> </Tr>

Who plays gibbs mother in law on ncis