Highlights from the Seventeenth Episode of Season 9 of NCIS

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget (Matt Jones, left) tries to butter up Gibbs in hopes of joining the team, on NCIS. Also picured: Sean Murray, right as NCIS Special Agent Timothy McGee Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved. Winning caption title by: Scari W.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget (Matt Jones, right) tries to butter up Gibbs in hopes of joining the team, on NCIS. Also picured: Sean Murray, left as NCIS Special Agent Timothy McGee Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Behind-the-scenes photo from "Need to Know". Picured: Cote de Pablo as NCIS Special Agent Ziva David and Michael Weatherly as NCIS Special Agent Anthony DiNozzo Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer, on NCIS. Pictured left to right: Pauley Perrette as Abby Sciuto and Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer, on NCIS. Pictured left to right: Rocky Carroll as NCIS Director Leon Vance, Sean Murray as NCIS Special Agent Timothy McGee and Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget (Matt Jones, right) tries to butter up Gibbs in hopes of joining the team, on NCIS. Also picured: Sean Murray, left as NCIS Special Agent Timothy McGee Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget (Matt Jones, left) tries to butter up Gibbs in hopes of joining the team, on NCIS. Also picured: Cote de Pablo as NCIS Special Agent Ziva David and Michael Weatherly as NCIS Special Agent Anthony DiNozzo Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget (Matt Jones, right) tries to butter up Gibbs in hopes of joining the team, on NCIS. Picured: Sean Murray as NCIS Special Agent Timothy McGee Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Tony DiNozzo (Michael Weatherly) & Ziva David (Cote de Pablo) have a close working relationship on NCIS.