Fans of “Chicago Fire” and its spinoff, “Chicago P.D.,” are used to seeing characters from one show drop by the other, usually for a short visit — or hookup.
This week an out-of-town guest, New York-based “Law & Order: SVU,” crashes the party. It’s the most elaborate three-way crossover yet for the trio of Dick Wolf-produced NBC dramas.
The first domino drops Tuesday (9 p.m., WMAQ-Channel 5) when Firehouse 51 responds to a house blaze that leads to the discovery of a child pornography ring. Enter Sgt. Voight and Detective Lindsay, who head for the Big Apple with Halstead to track down a victim in Wednesday’s “SVU” (8 p.m., WMAQ-Channel 5).
The trail leads back to Chicago, where detectives from New York’s special victims unit help “P.D’s” intelligence teamget to the bottom of the pedophilia racket — an emotionally charged case that crosses over into Lindsay’s professional and personal worlds (9 p.m., WMAQ-Channel 5).