Sean Murray (Timothy McGee) took the lead spot previously held by Harmon .
After Murray, the order followed with Wilmer Valderrama (Nick Torres), Katrina Law (Jessica Knight), Brian Dietzen (Dr. Jimmy Palmer), and Diona Reasonover (Kasie Hines). Special Billing: NCIS Season 20 Intro (Opening Credits)
The iconic theme composed by Brian Kirk remained the show's musical signature. Sean Murray (Timothy McGee) took the lead spot