NCIS is a CBS network show about a team of special agents from the Naval Criminal Investigative Service of the United States Navy and United States Marine Corps. The concept and characters were initially introduced in a two-part episode of the CBS series JAG (episodes 8.20 and 8.21). The show premiered on September 23, 2003. Its executive producer is Donald Bellisario.
- Jarvis George plays Navy Lieutenant Morgan Tolliver in the 2 part season 3 episode Hiatus.
- John Doman plays Lieutenant Cheney in the season 2 episode Doppleganger
- Merritt Wever plays Wendy Smith in the season 3 episode Switch.
- Rick Otto plays Adrian Nelson in the season 5 episode Family.