Warning: This article contains spoilers for NCIS season 22.It’s been an enormous season for NCIS, with the flagship series NCIS: Origins airing back-to-back on Monday nights. However, there won’t be a new episode of either series this Monday, with the holidays in full swing. Both NCIS series aired a holiday episode last week, with Christmas trees decorating each office. Seamus Dever’s Gabrielle LaRoche NCIS character returned to the flagship for the special installment, explaining where the potential NCIS mole had been in the weeks prior. The NCIS season 22 premiere introduced this potential villain as Special Agent Knight rejoined the team, making for an exciting new chapter.