NBC has announced a special two-hour crossover episode of Law & Order: Special Victims Unit and Law & Order: Trial By Jury.

The programme will air on May 3 at 9pm ET/PT. Guest stars will inclde Angela Lansbury, Bradley Cooper, Alfred Molina, Larry King, and Rita Moreno.

A press release from NBC explains the set-up, and be warned, this contains SPOILERS:

"On the first hour, Law & Order: SVU Detectives Benson and Stabler investigate the rape and murder of a woman found near a nightclub with $500 stuffed into her mouth. The money and fingerprints lead detectives to a hotshot lawyer Jason Whittaker, who is the trustee of the Duvall family. They then question matriarch Eleanor Duvall and her son Gabriel, and while the evidence points to Mr. Duvall, it is not enough to charge him. A surprising plot-twist puts A.D.A Novak in grave danger, and A.D.A. Tracy Kibre from Trial By Jury (TBJ) is brought in to work on the case.

"The crossover concludes on TBJ as A.D.A. Kibre (Bebe Neuwirth) works with Detectives Stabler and Benson to prosecute a serial rapist Mr. Duvall, whose trail of victims through the years has been whitewashed by his wealthy and protective mother Eleanor. A.D.A. Kibre must also overcome witness intimidation -- and even sees her crucial DNA evidence tossed out -- but the slippery suspect's lawyer has yet another surprise up his sleeve."