Gibbs' alias Leland Robert Spears was first introduced in Season 12 episode 16 "Blast From The Past".
Tobias Jelinek, the actor who portrays Bodie Whitman, had his first movie role as one of the bullies in Hocus Pocus. One of Sean Murray's more notable film roles is Thackery Binx in said movie.
Airs as episode 13 on Netflix, with Willoughby airing as episode 12
Around 12 minutes, Abby wondered if Gibbs is "pulling a Superman thing". Gibbs' actor Mark Harmon actually voiced Superman in the DC movie Justice League: Crisis on Two Earths (2010).
Tobias Jelinek, the actor who portrays Bodie Whitman, has also appeared in NCIS New Orleans, NCIS Los Angeles, and NCIS Hawaii. He plays a different role in each show.