Law & Order's 20 Year Reunion!

UPDATED 11/09/2009 at 01:00 AM EST • Originally published 11/09/2009 at 01:00 AM EST

DUN-DUN! TO CELEBRATE TV'S LONGEST-RUNNING DRAMA, PEOPLE ASSEMBLED SOME OF ITS MOST BELOVED CAST MEMBERS FOR A PAST-AND-PRESENT PERP LINEUP. RETURNING TO THE NBC SHOW'S MANHATTAN SET 'IS LIKE GOING BACK TO HIGH SCHOOL,' SAYS JESSE L. MARTIN. 'IT'S A TRIP!'

• CAREY LOWELL (1996-1998)

• DANN FLOREK (1990-1993)

• JESSE L. MARTIN (1999-2008)

• JILL HENNESSY (1993-1996)

• SAM WATERSTON (1994-present)

• Creator/Executive Producer DICK WOLF

• JEREMY SISTO (2007-present)

• ANGIE HARMON (1998-2001)

• S. EPATHA MERKERSON (1993-present)

• BENJAMIN BRATT (1995-1999)

• ALANA DE LA GARZA (2006-present)

• ANTHONY ANDERSON (2008-present)

• LINUS ROACHE (2007-present)