NBC airs three-drama — ‘Chicago Fire,’ ‘Law & Order: Special Victims Unit’ and ‘Chicago P.D.,’ — crossover story line | NevadaAppeal.com

NBC airs three-drama — ‘Chicago Fire,’ ‘Law & Order: Special Victims Unit’ and ‘Chicago P.D.,’ — crossover story line

The Associated Press

This photo provided by NBC shows Sophia Bush as Erin Lindsay, left, and Taylor Kinney as Kelly Severide, in the episode "Nobody Touches Anything" of season 3 on NBC's "Chicago Fire." A story arc about a child pornography ring will be featured on three NBC shows Tuesday and Wednesday, Nov. 11-12, 2014, including "Chicago Fire," "Chicago P.D." and "Law and Order: SVU." (AP Photo/NBC, Elizabeth Morris)

LOS ANGELES — 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.

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