hotly anticipated series “Law & Order: Organized Crime” will premiere April 1 as part of a two-hour crossover event with “Law & Order: SVU.” The show will see Christopher Meloni’s return to the franchise after spending a decade away (during which he spent his time on a wide variety of shows, from “True Blood” to “The Handmaid’s Tale”).Meloni, 59, first rose to prominence playing retired NYPD Det. Elliot Stabler for the first 12 seasons of the long-running series, from 1999-2011.