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'NCIS' Cast Tease 'Intense' Season 21 Finale: 'There Are Some Fundamental Changes' (Exclusive)

The cast members spoke with ET from the CBS fall schedule announcement celebration.

After hitting 1000 episodes in the franchise earlier this year, the cast members from the mothership show say the upcoming finale is not one to be missed as there could be some big shake-ups for longtime NCIS fans. Rocky Carroll, Diona Reasonover, Sean Murray, Katrina Law, Brian Dietzen and Gary Cole from 'NCIS' attend the CBS New Fall Schedule Celebration - Getty Images"I will say that there is -- there is a lot of soul-searching that goes on during this episode. Brian Dietzen as Jimmy Palmer, Gary Cole as Alden Parker, Katrina Law as Jessica Knight, and Wilmer Valderrama as Nicholas "Nick" Torres - CBS via Getty ImagesThe interview comes on the heels of NCIS: Hawai'i's cancellation after three seasons on air.

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