La Grenouille

Season Four:
Singled Out (73): We first hear of the character as DiNozzo and Shepard discuss DiNozzo's involvement in the case
Dead and Unburied (75): La Grenouille is mentioned while Gibbs and Shepard talk in the MTAC
Sandblast (77): we see DiNozzo on a date with his girlfriend, who we will eventually learn is the daughter of La Grenouille
Smoked (80): We see Shepard and DiNozzo in an operation to plant bugs on associates of Le Grenouille.
Driven (81):We see Shepard and DiNozzo continue their operation against associates of Le Grenouille.


The character is played by Armand Assante.   In Smoked, We see Shepard and DiNozzo in an operation to plant bugs on associates of Le Grenouille.