Gibbs rule 39a: There is no such thing as a small world.
The disguise Gibbs is wearing during the apprehension of Ajay Khan is the same look as Deputy Marshall Sam Gerrard in The Fugitive (1993) when he is undercover to retrieve another fugitive.
Ducky uses the statement 'speakin of the devil' went NCIS Director Craig, Greg Germann will later go on to play Hades the god of the underworld in Once Upon a Time (2011).