Dennis Box is a character from The Night Of and is played by Bill Camp. A veteran NYPD homicide detective.
Macaulay Culkin, Age, Wife, Brother, Siblings, Brenda Song, & Bunny Ears
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Into the Night (TV Series 2020–2021) - IMDb
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Dennis Box, Night of HBO Wiki
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The Night Of Series Finale: Actor Bill Camp on Playing Detective Box Again
Denis Leary - Wikipedia