Ncis Season 20 Intro (opening Credits) -

Shared by David McCallum (Dr. Donald "Ducky" Mallard) and Rocky Carroll (Leon Vance). "And" Credit: Awarded to Gary Cole (Alden Parker). Audio & Visual Updates

The marked a historic shift for the series, primarily due to the permanent removal of Mark Harmon (Leroy Jethro Gibbs) from the intro for the first time in the show's 20-year history. Key Cast Changes & Billing Order NCIS Season 20 Intro (Opening Credits)

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: Shared by David McCallum (Dr

Following Harmon's exit in early Season 19, the Season 20 credits established a new hierarchy: Katrina Law (Jessica Knight)