"Not only is this the origin episode for DiNozzo, but also for his Mighty Mouse stapler (Raimey bought it at a yard sale as the prize for an office pool won by DiNozzo).

When DiNozzo looks for his misplaced smartphone, he removes all his desk drawers where we can once again see the manila envelope taped underneath his top right drawer (seen in 8.15 Defiance filled with contraband such as a FBI crime scene sticker).

While working for Baltimore PD, DiNozzo states that he would rather catch the plague than be a Navy cop, which is probably meant to be a humorous reference to 2.22 SWAK when he actually catches the plague working for NCIS.
"