Gibb's rules: No. 1 Never put your suspects together. No.1 Never screw over your partner. No.3 Never be unreachable. No.3 Don't believe what you're told, double check. No.5 Don't waste good. No.8 Never take anything for granted. No.9 Never go anywhere without your knife. No. 10 Never get personally involved on a case. No. 12 Never date a co-worker. No.13 Never involve lawyers. No. 15 Always work as a team. No. 22 Never ever bother Gibbs in interrogation. No. 36 If you feel like you're being played, you probably are. No. 39 No such thing as a coincidence. No. 40 If you think someone is out to get you, they are. No.42 Never accept an apology from someone that has just sucker punched you. No. 45 Clean up the mess that you make. No. 51 Sometimes - you're wrong.
All three of the prisoners used to catch the hacker were arrested by the NCIS team within the last 3 years. Ajay Khan was arrested in Canary (2013), Kevin Hussein was arrested in Twenty Klicks (2014), and Heidi was arrested in Page Not Found (2014).