Mark Harmon Reflects on Humbling TV Debut with Father Tom Harmon
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- Mark Harmon recalls first TV ad with his father as pivotal.
- Harmon describes his first Kellogg's ad as 'humiliating'.
- The Kellogg's ad experience positively shifted Harmon's career.
- Harmon credits early TV production insights for career longevity.
- Harmon starred as Gibbs on 'NCIS' for nearly two decades.
- Harmon remains linked to 'NCIS' as producer and narrator.
- Harmon thanks his father for career advice and resilience.