"Chicago Fire," "Chicago P.D." and "Law & Order: Special Victims Unit" Converge in Series Crossover Story - NBC 6 South Florida
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"Chicago Fire," "Chicago P.D." and "Law & Order: Special Victims Unit" Converge in Series Crossover Story

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    Pictured: (l-r) Marina Squerciati as Kim Burgess, Mariska Hargitay as Olivia Benson, Jason Beghe as Hank Voight, Stella Maeve as Nadia in "Chicago P.D."

    NBC is airing an unusual hat-trick series crossover.

    Episodes of three of the network's dramas, "Chicago Fire," ''Law & Order: Special Victims Unit" and "Chicago P.D.," will share a story line about an effort to crack a child pornography ring.

    The three-parter begins at 10 p.m. EST Tuesday on "Chicago Fire" and wraps up Wednesday on the two other NBC dramas airing back to back from 9-11 p.m. EST.

    Making the ambitious crossover feasible: All the shows are produced by Wolf Films in association with Universal Television.

    Producer Dick Wolf said linking the two Chicago-based shows made sense, while drawing in New York-based "Law & Order: SVU" was a "little tricky."

    "But it wasn't too far-fetched to develop a story about child pornography that crosses state lines," Wolf said, which he called a sad reflection of reality.