NCIS fans are some of the most dedicated television fans we know of! The show's directors and producers should be cautious of details in the series because at some point or another, their viewers will find the mistakes! See what fans discovered from this first episode...

IN CASE YOU MISSED IT: NCIS fans notice a big mistake with "Ziva"

NCIS fans spotted this mistake about "Agent Gibbs"

Mark Harmon and Cote De Pablo in the hit series NCIS
Mark Harmon NCIS

Which 'NCIS' character was NOT first introduced in 'JAG'?