Faith is the tenth episode in Season Seven of NCIS and the 148th episode of the entire NCIS series.
The body of a Marine is found in some woods in the days leading up to Christmas and the team discover that he had recently become a Muslim, a decision that could serve as the main motive for his death. As Abby attempts to reunite a mother and son, even going so far as to recruit McGee for help, Gibbs is left shocked when he gets a surprise visit from his father who is hiding something...
In the bullpen, as Ziva joins him at his desk, McGee reveals that as a Marine, Ellis officially changed his religious status eight months ago from Christian to Muslim.
- Jackson Gibbs arrives in Washington D.C and it's revealed that he came to see his son for advice after killing a man who attempted to rob his store, and because it was Christmas.
- Ziva reveals that she speaks nine languages.
- It is revealed that Jackson Gibbs was once a bomber pilot.
- The song playing at the end of the episode is "Kangaroo Cry" by Blue October.
|Leroy Jethro Gibbs||Mark Harmon||Special Agent in charge of the NCIS Major Case Response Team.|
|Anthony DiNozzo||Michael Weatherly||Senior Agent and second-in-command of the NCIS Major Case Response Team.|
|Ziva David||Cote de Pablo||NCIS Probationary Agent and also a member of the NCIS Major Case Response Team.|
|Timothy McGee||Sean Murray (actor)||Junior Special Agent of the NCIS Major Case Response Team.|
|Abigail Sciuto||Pauley Perrette||Chief Forensic Specialist of the NCIS Major Case Response Team.|
|Leon Vance||Rocky Carroll||Director of NCIS.|
|Donald Mallard||David McCallum||Chief Medical Examiner of the NCIS Major Case Response Team.|
|James Palmer||Brian Dietzen||Assistant Medical Examiner.|
|Jackson Gibbs||Ralph Waite||Gibbs's father.|
|Colonel George Ellis, USMC Ret.||Joe Regalbuto||Former Marine who is now an ordained minister.|
|Lieutenant Commander Aaban El-Sayad||Corey Reynolds||A Navy Chaplain/Imam.|
|Patrick Ellis, USMC||Brando Eaton||Younger son of George Ellis who killed Lt. Thomas Ellis, his brother because he couldn't handle the fact that his brother was a convert to Islam.|
|Tina Ellis||Lindsay Pulsipher||Widow of Lt. Thomas Ellis.|
|Carol Wilson||Meredith Eaton||College friend of Abby's.|
|First Sergeant Louis Tibbens, USMC||Aaron McPherson||Member of Lt. Ellis's unit who distrusted him because of his faith.|
|Lara||Jenna Gavigan||Found the body while searching for a Christmas Tree.|
|Dean||Kristopher Higgins||Found the body while searching for a Christmas Tree.|
|Ensign Cara Blake||Rochelle Greenwood||Mother of Fisher Blake currently deployed to Afghanistan.|
|Delores Bromstead||Kate Fuglei||Human Resources, NCIS and Tony's Secret Santa.|
|Fisher Blake||Harrison Forsyth||Nephew of Carol Wilson and son of Cara Blake.|