The day is being used to celebrate 20 successful years of the hit franchise.
It has also been noted that during NCIS Season 21, the 1,000th episode of an NCIS program will arrive.
That number counts the episodes from all the NCIS spin-offs.
As part of the celebration, CBS is rolling out a take on Bandium – the app Alden Parker (played by Gary Cole) introduced to the team.
NCIS fans can access Bandium through the new NCISverse pages on Facebook and Instagram. Bandium will arrive on Monday, September 18.
And NCIS Day will also feature three primetime episodes of NCIS airing on CBS. While it won’t be new content, three classic episodes will return.
The NCIS Day schedule
Below is the NCIS Day schedule for Monday, September 25. The evening begins at 8/7c on CBS and includes three episodes that mark the show’s history
8/7c: Season 1, Episode 1 (Yankee White)
9/8c: Season 2, Episode 22 (SWAK)
10/9c: Season 19, Episode 11 (All Hands)
Yankee White is the premiere episode for the franchise, introducing the team and the format the show has followed for 20 years.
SWAK is a dramatic episode from Season 2. Abby Sciuto (Pauley Perrette) discovers a substance in the squad room that leads to a bio-hazard situation.
All Hands features Gary Cole playing Special Agent Alden Parker. Parker leads the team on a mission to a ship in distress. The team then has to deal with terrorists.
The episode (All Hands) features new team members – including actress Katrina Law as Special Agent Jessica Knight.