The first season of (originally titled Navy NCIS ) premiered on September 23, 2003 , on CBS. It follows the Major Case Response Team (MCRT) as they investigate crimes related to the Navy and Marine Corps. Season Overview

A former homicide detective with a charismatic but often immature personality.

The team’s Goth-styled forensic specialist.

A former Secret Service agent who provides profiling expertise and balances out the team's dynamics.

The main antagonist introduced late in the season, a rogue Mossad agent who targets the team. Key Episodes

Debuts mid-season as the new assistant medical examiner after Gerald Jackson is injured.

The stoic lead agent known for his strict rules and interrogation skills.

Share.

Leave A Reply