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‘NCIS: Origins’ To Feature Guest Appearance By Mark Harmon During Crossover Event With ‘NCIS’

'NCIS: Origins' To Feature Guest Appearance By Mark Harmon During Special Crossover Event With 'NCIS'

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11 Actors Were Considered to Play Leroy Jethro Gibbs on 'NCIS' Before Mark Harmon Was Cast (Including Two Oscar Winners!)

11 Actors Were Considered to Play Leroy Jethro Gibbs on 'NCIS' Before Mark Harmon Was Cast (Including 2 Oscar Winners!)

11 Actors Were Considered to Play Leroy Jethro Gibbs on 'NCIS' Before Mark Harmon (There Are 2 Oscar Winners On The List!)