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
Adm. A.J. Chegwidden
John M. Jackson
Harriet Sims / Phyllis Diller / Jonie James
Karri Turner
Cmdr. Sturgis Turner
Scott Lawrence
Petty Officer Jennifer Coates
Zoe McLellan
Jason Tiner / Petty Officer First Class Jason Tiner / Archie Bond
Chuck Carrington
Victor 'Gunny' Galindez
Randy Vasquez
Clayton Webb
Steven Culp
Clifford Blakely
John DeMita
Guest Star
Bill Cobbs
Guest Star
Wade Williams
Senator Edward Sheffield
Dean Stockwell
Loren Singer / Meghan O'Hara
Nanci Chambers
Guest Star
Adam Baldwin
Sadik Fahd
Bernard White
Guest Star
Richard McGonagle
Guest Star
Jerry Coyle
Guest Star
Dan Lauria
Guest Star
Douglas Spain
Mic Brumby
Trevor Goddard
Guest Star
Tamara Mello
Guest Star
Tony Lee
Guest Star
Michael Bofshever
Edward Hardy
Jack Stehlin
Cmdr. Amy Helfman
Jennifer Savidge
Capt. Molina
Del Zamora
Guest Star
Lyman Ward
Guest Star
Michaela Conlon
Guest Star
William Russ
Guest Star
Steven Flynn
Guest Star
John Dennis Johnston
Guest Star
Chris Ellis
Guest Star
Christopher Maher
Maria Elena
Alana De La Garza
Guest Star
Sean O'Bryan
Meg Austin
Tracey Needham
Guest Star
Jeffrey Pierce
Guest Star
Lamont Thompson
Guest Star
Tom Schanley
Guest Star
Loryn Locklin
Guest Star
Andrew Caple-Shaw
Guest Star
Nicki Micheaux
Guest Star
Winifred Freedman
Guest Star
Tyrees Allen
SecNav Alexander Nelson / Alexander Nelson / John C. Spencer
Paul Collins
Guest Star
Josh Blake
Guest Star
Jeremy Davidson
Guest Star
Sammi Rotibi
Guest Star
Jessica Stier
Rene Peterson
Cindy Ambuehl
Guest Star
Kyme
Guest Star
Steven Anderson
Stiles Morris
Harrison Page
Guest Star
Bahar Soomekh
Guest Star
Donnie Jeffcoat
Guest Star
Michael Ensign
Mikey Roberts / Antonio
Michael Bellisario
Guest Star
Ned Schmidtke
Guest Star
Eric Strickland
Guest Star
Melinda Sward
Alan Mattoni / Lt. Cmdr. Alan Mattoni
Rif Hutton
Guest Star
Dawn Didawick
Guest Star
Maria Quiban
Mattie Grace Johnson
Hallee Hirsh
Guest Star
Ben Livingston
Guest Star
Mary Ellen Lyon
Guest Star
Alexander Scarlis
Guest Star
Scott Rabinowitz
Bobbi Latham
Anne-Marie Johnson
Guest Star
John Prosky
Stuart Dunston
John D'Aquino
Guest Star
Chuck De Caro
Guest Star
Russell Edge
Admiral Thomas Boone / Thomas Boone
Terry O'Quinn
Ted Lindsey / Cmdr. Ted Lindsey / Captain Stewart
W.K. Stratton
Big Bud Roberts
Jeff MacKay
Carolyn Imes
Dana Sparks
Sidney Walden
Cynthia Sikes
Alison Krennick
Andrea Thompson
Jordan Parker
Susan Haskell
Chloe Madison
Mae Whitman
Lt. Gregory Vukovic
Chris Beetem
Dalton Lowne
Larry Poindexter
Cahill / First Sergeant Creed / Seal Instructor
Matt Sigloch
Clark Palmer
Peter Murnik
Mark 'Falcon' Sokol / Submarine Skipper
Rex Linn
Ned Bannon / Capt. French
Glenn Morshower
Danny Walden / Terry Guitry
Sean Murray
Lt. Alfred Aldridge
A.J. Tannen
Lt. Elizabeth 'Skates' Hawkes / Elizabeth 'Skates' Hawkes
Sibel Ergener
Teresa Coulter / Lt. Cmdr. Teresa Coulter
Trisha Yearwood
Kate Pike / Cmdr. Caitlin 'Kate' Pike
Andrea Parker
Tom Hart / Captain Trecher / Jeb Stuart Wilkins
Guy Garner
Ross
Bill Bolender
Annie Pendry
Daphne Ashbrook
Meredith Cavanaugh / Maryann Cavendish
Isabella Hofmann
Admiral Drake
John Roselius
Chief of Chaplains / Chaplain
Scott Haven
Capt. Tobias Ingles / Gary Hochausen
Gary Graham