Tom Selleck
Frank Reagan (22 eps)
Donnie Wahlberg
Danny Reagan (22 eps)
Bridget Moynahan
Erin Reagan-Boyle (22 eps)
Will Estes
Jamie Reagan (22 eps)
Len Cariou
Henry Reagan (22 eps)
Vanessa Ray
Eddie Janko (22 eps)
Andrew Terraciano
Sean Reagan (22 eps)
Gregory Jbara
Garrett Moore (22 eps)
Robert Clohessy
Sid Gormley (22 eps)
Abigail Hawk
Abigail Baker (22 eps)
Marisa Ramirez
Maria Baez (22 eps)
Sami Gayle
Nicky Reagan-Boyle (22 eps)
Miriam A. Hyman
ME Emile Cooper (4 eps)
Jerry DiLeo
Police Officer / Italian Mobster (4 eps)
Lynn Marocola
Police Officer (uncredited) (3 eps)
Michael DeLorenzo
Fausto (1 eps)
Ashlie Atkinson
Sandra Colby (1 eps)
Erin Dilly
Gwen Rice (1 eps)
Richie Stephens
Vlad (1 eps)
Kevin Corrigan
Jimmy Pearson (1 eps)
Jesse Ray Sheps
Malik Nejari (1 eps)
Robin Skye
Judge Adrian Jones (1 eps)
Zach Appelman
Sean Bartch (1 eps)
Abbi Snee
Jennifer Crowley (1 eps)
Derek Chadwick
Sam (1 eps)
Delaney Williams
Bureau Chief Dennis Egan (1 eps)
Geoffrey Owens
Sergant Weller (1 eps)
Angela Rambourg
Sharyn Sarni (1 eps)
Thomas Bair
Kyle Rice (1 eps)
Robert Wuhl
Captain Ward Gibson (1 eps)
Caleb McLaughlin
ToneLane (1 eps)
Danny Bolero
Owner (1 eps)
Keren Dukes
Cerise Paxton (1 eps)
Odette Warder Henderson
Senator (1 eps)
Dean Ciallella
Wedding Guest (uncredited) (1 eps)
Liza Colón-Zayas
Ana Baez (1 eps)
Justin Marcel McManus
Uniform 1 (1 eps)
Noah Robbins
Richie Turner (1 eps)
Ariane Rinehart
Tara (1 eps)
Jadah Marie
Ashley Reed (1 eps)
Czarina Mada
Uniform (1 eps)
Joe Holt
Donald (1 eps)
David Castro
Louis Edwards (1 eps)
Kate Boyer
Michele (1 eps)
Annie Pisapia
Dinner Patron (1 eps)