The casts of Law & Order, SVU, and Organized Crime are joining forces.

TheLaw & Ordercinematic universe is colliding for a historic crossover event.

The crossover will then drop on thePeacockstreaming platform the next day, Sept. 23.

Law and Order Crossover event Law & Order Press Day – Pictured: (l-r) Law & Order" ; Sam Waterston, Law & Order: Special Victims Unit; Mariska Hargitay, Law & Order: Organized Crime; Chris Meloni

‘Law & Order’ to air first-ever crossover special with all 3 NBC dramas.Maarten de Boer/NBC/NBCU Photo Bank via Getty Images

Frank Cosgrove ofLaw & Orderteams up withMehcad Brooks' Det.

Jalen Shaw, the latter making his debut on the episode.

But then it looks like this isn’t your typical homicide, soMariska Hargitay’s Capt.

Law and Order Crossover event LAW & ORDER: PREMIERE – “Gimme Shelter” – Pictured: (l-r) Jeffrey Donovan as Detective Frank Cosgrove, Mariska Hargitay as Captain Olivia Benson, Mehcad Brooks as Detective Jalen Shaw

Jeffrey Donovan as Detective Frank Cosgrove, Mariska Hargitay as Captain Olivia Benson, Mehcad Brooks as Detective Jalen Shaw.Will Hart/NBC

Olivia Benson fromSVUandChristopher Meloni’s Det.

Elliot Stabler from Organized Crime are called in to help.

NBC released a first-look promo and photo of the uniting casts.

“This was a coordinated attack,” Benson determines, as heard in the teaser.

“I’d like to combine forces, work this case together.”

Stabler mentions “arms, drugs, sex trafficking,” so you know it’s some serious stuff.

“If what you’re saying is true, it’s beyond comprehension,” McCoy teases.

Wolf is referring to Rick Eid (Law & Order) and Gwen Sigan (Chicago P.D.)

who wrote “Gimme Shelter.”

The never-before-done crossover will help kick off NBC’s broadcast season.

“We couldn’t be more excited to open our season with such a historic event.”