What NCIS New Orleans episode it this??

Can you guys help me with the non-porn related question??

I coulnd't watch the whole episode.

But it starts with a sort of comic-con convention where a guy falls dead.
The guy turns out to be a partner of a former high school crush of sebastian.
She develloped a game that a hacker named the Jackyll steals and uses to take over planes.

Can anybody name me the episode and what season it was??