Watch NCIS Online: Season 19 Episode 19

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What really happened to the Quantico base?

On NCIS Season 19 Episode 19, McGee befriended a teenager after it emerged that a group kept breaking into the base.

Actions From the Past - NCIS

McGee was adamant to find out what was happening, and more importantly, why it was happening.

Elsewhere, Alden was shocked by the arrival of his ex-wife.

What drama kicked off?

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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.

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