Lt./Lt. Cmdr. Harmon "Harm" Rabb, Jr.

David James Elliott

Maj./Lt. Col. Sarah "Mac" MacKenzie

Catherine Bell

Lt. j.g./Lt. Bud Roberts

Patrick Labyorteaux

Admiral Albert Jethro 'A.J' Chegwidden

John M. Jackson

Stiles Morris

Harrison Page

Harriet Sims / Phyllis Diller / Jonie James

Karri Turner

Loren Singer / Meghan O'Hara

Nanci Chambers

Michael Whaley

Mic Brumby

Trevor Goddard

Jason Tiner / Petty Officer First Class Jason Tiner / Archie Bond

Chuck Carrington

Teresa Coulter / Lt. Cmdr. Teresa Coulter

Trisha Yearwood

Victor 'Gunny' Galindez

Randy Vasquez

Alan Mattoni / Lt. Cmdr. Alan Mattoni

Rif Hutton

Capt. Berroa

Nestor Serrano

Guest Star

David Carpenter

Mikey Roberts / Antonio

Michael Bellisario

Sturgis Turner

Scott Lawrence

Guest Star

Sydney Walden

Clark Palmer

Peter Murnik

Guest Star

Sal Landi

Guest Star

David Barry Gray

Clayton Webb

Steven Culp

Sergei Zhukov

Jade Carter

Admiral Thomas Boone / Thomas Boone

Terry O'Quinn

Guest Star

William Katt

Guest Star

Stan Kirsch

Rene Peterson

Cindy Ambuehl

Guest Star

Ray Baker

Guest Star

Tina Lifford

Guest Star

Wanda Acuna

Guest Star

Julius Carry

Dr. Sidney Walden

Cynthia Sikes

Guest Star

Matt Mulhern

Guest Star

Ben Caswell

Guest Star

Brian McGovern

Guest Star

Ricki Lopez

Guest Star

Seth Jaffe

Guest Star

Chas. Floyd Johnson

Guest Star

Kevin Lowe

Guest Star

Jaimz Woolvett

Kate Pike / Cmdr. Caitlin 'Kate' Pike

Andrea Parker

Danny Walden / Terry Guitry

Sean Murray

Guest Star

Stephen Mendel

Guest Star

George Perez

SecNav Alexander Nelson / Alexander Nelson / John C. Spencer

Paul Collins

Guest Star

Peter Jason

Guest Star

Pepper Sweeney

Guest Star

Stevie Johnson

Guest Star

Michael Spound

Guest Star

Jon Hershfield

Guest Star

Kate Jennings Grant

Guest Star

Dianna Miranda

Guest Star

Allan Kolman

Guest Star

Adam Beason

Guest Star

Sofia Karstens

Guest Star

Bobbie Eakes

Chloe Madison

Mae Whitman

Guest Star

Tom Amandes

Cmdr. Crozier

Todd Kimsey

Guest Star

James Patrick Stuart

Guest Star

Josh Taylor

Guest Star

Tom McCleister

Guest Star

Nicolas Surovy

Guest Star

Phil Reeves

Lt. Elizabeth 'Skates' Hawkes / Elizabeth 'Skates' Hawkes

Sibel Ergener

Guest Star

Richard Tanner

Guest Star

Kevin Fry

Bo Sun's Mate

Reed Frerichs

Cmdr. Amy Helfman

Jennifer Savidge

Guest Star

Christopher Daniel Barnes

Guest Star

Vincent Kelly

Guest Star

Yancey Arias

Guest Star

Gina Hecht

Guest Star

Richard Lawson

Guest Star

Christina Pickles

Bobbi Latham

Anne-Marie Johnson

Guest Star

Steve Vinovich

Big Bud Roberts

Jeff MacKay

Stuart Dunston

John D'Aquino

Guest Star

Robert Lipton

Guest Star

Marc Gomes

Meg Austin

Tracey Needham

Guest Star

David Hayward

Guest Star

Richard Penn

Guest Star

Susan Enriquez

Guest Star

Beverly Leech

Guest Star

Eric Pierpoint

Guest Star

Matt McKenzie

Guest Star

Craig Watkinson

Guest Star

Laurence Lau

Guest Star

Ashley Tucker

Guest Star

Greg Watanabe

Guest Star

Larry Bagby III

Guest Star

Kat Sawyer

Guest Star

David A Saunders

Guest Star

Cheryl Pollak

Guest Star

Tucker Smallwood

Reynalda Mantilla

Aymara De Llano

Guest Star

Gerald McRaney

Guest Star

Gary Miller