A crossover is when a character from one show appears as the same character in another show. This implies that both shows share the same fictional universe, or canon. Many characters from the original Law & Order have crossed over on other shows--both in the Law & Order franchise and in unrelated shows.
Main Characters
Law & Order
- Detective Lennie Briscoe
- Law & Order (12 seasons, 273 episodes, 1 movie)
- Homicide: Life on the Street (3 seasons, 3 episodes)
- Law & Order: Special Victims Unit (1 season, 3 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Law & Order: Trial by Jury (2 episodes)
- Detective Joe Fontana
- Law & Order (2 seasons, 46 episodes)
- Law & Order: Trial by Jury (1 episode)
- Detective Ed Green
- Law & Order (8 seasons, 198 episodes)
- Law & Order: Special Victims Unit (1 season, 2 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Law & Order: Trial by Jury (1 episode)
- Detective Mike Logan
- Law & Order (5 seasons, 111 episodes, 1 movie)
- Homicide: Life on the Street (1 season, 1 episode)
- Law & Order: Criminal Intent (4 seasons, 36 episodes)
- Detective Rey Curtis
- Law & Order (5 seasons, 95 episodes, 1 movie)
- Homicide: Life on the Street (3 seasons, 3 episodes)
- Captain Donald Cragen
- Law & Order (3 seasons, 69 episodes, 1 movie)
- Law & Order: Special Victims Unit (16 seasons, 307 episodes)
- Lieutenant Anita Van Buren
- Law & Order (17 seasons, 388 episodes, 1 movie)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Law & Order: Trial by Jury (1 episode)
- E.A.D.A./D.A. Jack McCoy
- Law & Order (16 seasons, 367 episodes, 1 movie)
- Homicide: Life on the Street (2 seasons, 2 episodes)
- Law & Order: Special Victims Unit (3 seasons, 3 episodes)
- Law & Order: Trial by Jury (2 episodes)
- E.A.D.A./Bureau Chief Michael Cutter
- Law & Order (3 seasons, 63 episodes)
- Law & Order: Special Victims Unit (1 season, 4 episodes)
- A.D.A./Defense Attorney Paul Robinette
- Law & Order (6 seasons, 69 episodes)
- Chicago Justice (1 episode)
- A.D.A. Claire Kincaid
- Law & Order (3 seasons, 68 episodes)
- Homicide: Life on the Street (1 season, 1 episode)
- A.D.A./Defense Attorney/Judge Jamie Ross
- Law & Order (4 seasons, 49 episodes)
- Homicide: Life on the Street (1 season, 1 episode)
- Law & Order: Trial by Jury (2 episodes)
- A.D.A. Abbie Carmichael
- Law & Order (3 seasons, 72 episodes)
- Law & Order: Special Victims Unit (1 season, 6 episodes)
- A.D.A./D.D.A./A.U.S.A. Connie Rubirosa
- Law & Order (4 seasons, 85 episodes)
- Law & Order: LA (8 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- D.A. Adam Schiff
- Law & Order (10 seasons, 228 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- D.A. Nora Lewin
- Law & Order (2 seasons, 46 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Law & Order: Special Victims Unit (2 seasons, 2 episodes)
- D.A. Arthur Branch
- Law & Order (5 seasons, 116 episodes)
- Law & Order: Special Victims Unit (4 seasons, 11 episodes)
- Law & Order: Trial by Jury (13 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Conviction (1 episode)
- Dr. Elizabeth Olivet
- Law & Order (15 seasons, 88 episodes)
- New York Undercover (1 season, 1 episode)
- Law & Order: Special Victims Unit (4 seasons, 5 episodes)
- Law & Order: Trial by Jury (1 episode)
- Law & Order: Criminal Intent (1 season, 1 episode)
Law & Order: Special Victims Unit
- Detective Elliot Stabler
- Law & Order: Special Victims Unit (12 seasons, 266 episodes)
- Law & Order (1 season, 2 episodes)
- Law & Order: Trial by Jury (1 episode)
- Detective/Sergeant/Lieutenant Olivia Benson
- Law & Order (2 seasons, 3 episodes)
- Law & Order: Trial by Jury (1 episode)
- Chicago P.D. (2 seasons, 3 episodes)
- Chicago Fire (1 season, 1 episode)
- Detective Odafin Tutuola
- Law & Order (1 season, 1 episode)
- Chicago P.D. (3 seasons, 3 episodes)
- A.D.A./Bureau Chief Alexandra Cabot
- Law & Order: Special Victims Unit (9 seasons, 97 episodes)
- Conviction (13 episodes)
- A.D.A. Casey Novak
- Law & Order: Special Victims Unit (7 seasons, 113 episodes)
- Law & Order: Trial by Jury (1 episode)
- M.E. Melinda Warner
- Law & Order: Special Victims Unit (16 seasons, 169 episodes)
- Law & Order: Trial by Jury (1 episode)
- Detective Amanda Rollins
- Chicago P.D. (2 seasons, 2 episodes)
- Chicago Fire (1 season, 1 episode)
- Detective Nick Amaro
- Law & Order: Special Victims Unit (4 seasons, 90 episodes)
- Chicago P.D. (1 season, 2 episodes)
- Detective Dominick Carisi, Jr.
- Chicago P.D. (1 season, 1 episode)
Law & Order: Criminal Intent
- Detective/Lieutenant Alexandra Eames
- Law & Order: Criminal Intent (10 seasons, 142 episodes)
- Law & Order: Special Victims Unit (2 seasons, 2 episodes)
Law & Order: Trial by Jury
- Bureau Chief Tracey Kibre
- Law & Order: Trial by Jury (13 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- D.A. Investigator Hector Salazar
- Law & Order: Trial by Jury (12 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
Homicide: Life on the Street
- Lieutenant Al Giardello
- Homicide: Life on the Street (7 seasons, 118 episodes, 1 movie)
- Law & Order (1 season, 1 episode)
- Detectives Tim Bayliss
- Homicide: Life on the Street (7 seasons, 118 episodes, 1 movie)
- Law & Order (1 season, 1 episode)
- Detectives Frank Pembleton
- Homicide: Life on the Street (6 seasons, 98 episodes, 1 movie)
- Law & Order (1 season, 1 episode)
- Detective Paul Falsone
- Homicide: Life on the Street (3 seasons, 46 episodes, 1 movie)
- Law & Order (1 season, 1 episode)
- Detective/Sergeant/D.A. Investigator John Munch
- Homicide: Life on the Street (7 seasons, 119 episodes, 1 movie)
- Law & Order (4 seasons, 4 episodes)
- Law & Order: Special Victims Unit (16 seasons, 242 episodes)
- The Beat (1 season, 1 episode)
- Law & Order: Trial by Jury (1 episode)
- The Wire (1 season, 1 episode)
- A.S.A. Ed Danvers
- Homicide: Life on the Street (7 seasons, 37 episodes, 1 movie)
- Law & Order (1 season, 2 episodes)
- Detective Rene Sheppard
- Homicide: Life on the Street (1 season, 21 episodes, 1 movie)
- Law & Order (1 season, 1 episode)
- Detective Meldrick Lewis
- Homicide: Life on the Street (7 seasons, 115 episodes, 1 movie)
- Law & Order: Special Victims Unit (1 season, 1 episode)
Law & Order: LA
- Detective Rex Winters
- Law & Order: LA (14 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Deputy D.A. Jonah Dekker
- Law & Order: LA (16 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
Chicago P.D.
- Detective Erin Lindsay
- Chicago Fire (3 seasons, 4 episodes)
- Chicago P.D. (4 seasons, 84 episodes)
- Law & Order: Special Victims Unit (3 seasons, 4 episodes)
- Chicago Med (2 seasons, 6 episodes)
- Chicago Justice (1 episode)
- Sergeant Hank Voight
- Law & Order: Special Victims Unit (2 seasons, 3 episodes)
- Chicago Justice (3 episodes)
- Detective Jay Halstead
- Law & Order: Special Victims Unit (1 season, 2 episodes)
- Officer Kim Burgess
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Officer Sean Roman
- Chicago P.D. (2 seasons, 46 episodes)
- Chicago Fire (2 seasons, 8 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Chicago Med (1 season, 3 episodes)
- Detective Antonio Dawson
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Chicago Justice (13 episodes)
Other Shows
- U.S. Marshall Mary Shannon (In Plain Sight)
- In Plain Sight (5 seasons, 61 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- A.S.A./A.D.A. Peter Stone (Chicago Justice)
- Chicago P.D. (2 seasons, 3 episodes)
- Chicago Justice (13 episodes)
- Chicago Med (1 season, 1 episode)
- Law & Order: Special Victims Unit (1 season, 7 episodes)
Recurring Characters
Law & Order
- Dr. Emil Skoda
- Law & Order (9 seasons, 44 episodes)
- Law & Order: Special Victims Unit (1 season, 6 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- New York Undercover (1 season, 1 episode)
- Dr. Elizabeth Rodgers
- Law & Order (19 seasons, 142 episodes, 1 movie)
- Law & Order: Special Victims Unit (1 season, 9 episodes)
- Law & Order: Criminal Intent (10 seasons, 110 episodes)
- Law & Order: Trial by Jury (1 episode)
- Judge Walter Bradley
- Law & Order (9 seasons, 14 episodes)
- Law & Order: Special Victims Unit (9 seasons, 18 episodes)
- Law & Order: Trial by Jury (1 episode)
- Conviction (2 episodes)
- Judge Margaret Barry
- Law & Order (8 seasons, 9 episodes)
- Law & Order: Special Victims Unit (1 season, 2 episodes)
- Judge Rebecca Steinman
- Law & Order (7 seasons, 8 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Law & Order: Trial by Jury (1 episode)
- Judge Morris Torledsky
- Law & Order (15 seasons, 26 episodes)
- Law & Order: Trial by Jury (2 episodes)
- Judge Janice Goldberg
- Law & Order (7 seasons, 12 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Judge William Wright
- Law & Order (4 seasons, 4 episodes)
- Law & Order: Trial by Jury (1 episode)
- Judge Derek Hafner
- Law & Order (3 seasons, 3 episodes)
- Law & Order: Trial by Jury (2 episodes)
- Judge Walter Schreiber
- Law & Order (10 seasons, 11 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Judge Harrison Taylor
- Law & Order (6 seasons, 9 episodes)
- Law & Order: Trial by Jury (1 episode)
- Judge Shirley Taylor
- Law & Order (5 seasons, 7 episodes)
- Conviction (2 episodes)
- Defense Attorney Shambala Green
- Law & Order (4 seasons, 7 episodes)
- Chicago P.D. (1 season, 1 episode)
- Defense Attorney Dave Seaver
- Law & Order (2 seasons, 2 episodes)
- Law & Order: Special Victims Unit (4 seasons, 7 episodes)
- Professor Norman Rothenberg
- Law & Order (8 seasons, 8 episodes)
- Law & Order: Trial by Jury (1 episode)
- Defense Attorney Peter Behrens
- Law & Order (6 seasons, 6 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Law & Order: Trial by Jury (1 episode)
- Defense Attorney/Judge Danielle Melnick
- Law & Order (13 seasons, 13 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Chicago Justice (1 episode)
- Defense Attorney Bernie Adler
- Law & Order (2 seasons, 2 episodes)
- Law & Order: Trial by Jury (1 episode)
- Defense Attorney Stan Shatenstein
- Law & Order (2 seasons, 2 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Defense Attorney Randy Dworkin
- Law & Order (2 seasons, 3 episodes)
- Law & Order: Special Victims Unit (1 season, 2 episodes)
- Detective Mariluz Rivera
- Law & Order (3 seasons, 18 episodes)
- Law & Order: Criminal Intent (1 season, 1 episode)
- Forensics Technician Arlene Shrier
- Law & Order (9 seasons, 16 episodes)
- Law & Order: Criminal Intent (3 seasons, 3 episodes)
Law & Order: Special Victims Unit
- Judge Alan Ridenour
- Law & Order: Special Victims Unit (7 seasons, 14 episodes)
- Law & Order: Criminal Intent (2 seasons, 2 episodes)
- Judge Susan Valdera
- Law & Order: Special Victims Unit (4 seasons, 5 episodes)
- Law & Order (1 season, 1 episode)
- Defense Attorney Lionel Granger
- Law & Order: Special Victims Unit (6 seasons, 10 episodes)
- Law & Order (1 season, 1 episode)
- Dr. Rohit Mehta
- Law & Order: Special Victims Unit (3 seasons, 5 episodes)
- Law & Order (1 season, 1 episode)
Law & Order: Criminal Intent
- Nicole Wallace/Madeline Haynes
- Law & Order: Criminal Intent (4 seasons, 5 episodes)
- Jo (1 season, 1 episode)
- Detective Louise Campesi
- Law & Order: Criminal Intent (3 seasons, 6 episodes)
- Law & Order: Special Victims Unit (3 seasons, 4 episodes)
Law & Order: Trial by Jury
- Judge Amanda Anderlee
- Law & Order (1 season, 1 episode)
- Law & Order: Trial by Jury (3 episodes)
Homicide: Life on the Street
- Gwen Munch
- Homicide: Life on the Street (1 seasons, 1 episode)
- Law & Order: Special Victims Unit (2 seasons, 2 episodes)
- Billie Lou Hatfield
- Homicide: Life on the Street (1 season, 15 episodes, 1 movie)
- Law & Order: Special Victims Unit (1 season, 1 episode)
Chicago P.D.
- Nadia Decotis
- Chicago P.D. (2 seasons, 19 episodes)
- Law & Order: Special Victims Unit (1 season, 1 episode)
- Dr. Greg Yates
- Chicago P.D. (2 seasons, 2 episodes)
- Law & Order: Special Victims Unit (2 seasons, 4 episodes)
Guest Characters
Law & Order
- Defense Attorney Rowan
- Defense Attorney Dean Connors
- Brian Egan & Kendall Egan
- Law & Order - Homicide: Life on the Street
- Season 6: "Charm City" - Season 4: "For God and Country"
- Law & Order - Homicide: Life on the Street
- Dr. Steven Janaway, Gayle Janaway, Defense Attorney Leslie Drake, & Johnny Ramirez
- Law & Order - Homicide: Life on the Street
- Season 8: "Baby, It's You" - Season 6: "Baby, It's You (2)"
- Law & Order - Homicide: Life on the Street
- Independent Counsel William Dell, Katherine Rainer, Ned Burks & Judy Palnick
- Defense Attorney Jerry Kleinert
- Jill Templeton
- Judge Barry Abrams
- Emiliano Ortiz
Law & Order: Special Victims Unit
- Defense Attorney Patrick Rumsey, Stephanie Mulroney, Regina Mulroney, Emily Shore, Helen Katisch, Pauline Brecker, Delia Woodruff & Police Commissioner's Aide
- Gabriel Duvall, Eleanor Duvall, Defense Attorney Jason Whitaker, Nina Zergin & Mildred Quintana
- April Troost & Lorraine Dillon
- Teddy Courtney
- Law & Order: Special Victims Unit - Chicago P.D.
- Season 16: "Chicago Crossover" - Season 2: "They’ll Have To Go Through Me"
- Law & Order: Special Victims Unit - Chicago P.D.
Law & Order: Criminal Intent
- Defense Attorney Ronald Hardin
- Father Chris Shea
The Tommy Westphall Universe
The Law & Order franchise entered The Tommy Westphall Univerwse when John Munch crossed over to Law & Order while he was still a regular on Homicide: Life on the Street. Then he crossed over to The X-Files. The X-Files popularized the fictional Morley cigarette brand. Some have taken any appearance of that brand as a connection to The X-Files. These connections are non-canon to the Law & Order franchise.