Inside the Friendship of Mark Harmon and David McCallum March 13, 2026 by Youssef ADVERTISEMENT Join the conversation: What is your favorite memory or episode featuring David McCallum on NCIS? Share your thoughts in the comments and celebrate the legacy of an actor who made a lasting impact on television. ←PreviousNext→
Join the conversation: What is your favorite memory or episode featuring David McCallum on NCIS? Share your thoughts in the comments and celebrate the legacy of an actor who made a lasting impact on television.
