| Rob Lowe as | Sam (Samuel Norman) Seaborn | Deputy Communications Director |
| Stockard Channing as | Abbey (Abigail Ann) Bartlet M.D. | First Lady |
| Dulé Hill as | Charlie (Charles) Young | Personal Aide to the President |
| Allison Janney as | C.J. (Claudia Jean) Cregg | Press Secretary |
| Janel Moloney as | Donna (Donnatella) Moss | Assistant to Deputy Chief of Staff |
| Richard Schiff as | Toby (Tobias Zachary) Ziegler | Communications Director |
| John Spencer as | Leo Thomas McGarry | Chief of Staff |
| Bradley Whitford as | Josh (Joshua) Lyman | Deputy Chief of Staff |
| and Martin Sheen as |
Jed (Josiah Edward) Bartlet | President of the United States |
| Special Guest Stars | ||
| Lily Tomlin as | Debbie (Deborah) Fiderer | President's Secretary |
| Joshua Malina as | Will (William) Bailey | Orange County Campaign Manger |
| and Tim Matheson as |
John Hoynes | Vice President |
| Guest Starring | ||
| Geoff Pierson as | Senator Triplehorn | Senate Minority Leader |
| Lucinda Jenney as | Karen Kroft | Defeated Michigan Democrat |
| Danica McKellar as | Elsie Snuffin | Orange County Campaign Staffer |
| Renée Estevez as | Nancy | Aide |
| Bernard White as | Dr. Ehsan Mohebi | Surgeon |
| NiCole Robinson as | Margaret | Hooper (last name) / Assistant to Chief of Staff |
| Wolf Muser as | Ambassador Von Rutte | Swiss Ambassador |
| Paul Vincent O'Connor as | Laney | in transplant meetings |
| Faran Tahir as | Manny | in Sit Room meeting |
| Co-Starring | ||
| Jennifer Parsons as | Aide | in transplant meetings |
| Joel Anderson as | Aide | in Sit Room meeting / Clark |
| Dennis Neal as | Springer | in Sit Room meeting |
| Emiko Parise as | Aide | Bobby / previously Carrie |
| Leigh Curran as | NASA Aide | Neptune meeting |
| Michael Raysses as | Reporter | Ted Willard / Orange County Post-Gazette Reporter |
| Kim Webster as | Ginger | Assistant to Communications' Director |
| Devika Parikh as | Bonnie | Communications' Aide |
| Melissa Fitzgerald as | Carol | Fitzpatrick (last name) Assistant to the Press Secretary |
| Timothy Davis-Reed as | Mark | O'Donnell (last name) / Reporter |
| Anita Dashiell as | Reporter | Joe (first name) in Orange County |
"I think the normal re-election cycle is, we win the election and then the scandals start happening one by one," he said. "I don't know if we'll repeat that, but in real life, you win the election and that's when all the dirt gets uncovered, right?" - Richard Schiff
"Aaron Sorkin wants to put fun back into 'West Wing' "
by Rob Owen
September 25, 2002
Pittsburgh Post-Gazette
On this day, he [Aaron Sorkin] does praise "West Wing" scribes Kevin Falls and Eli Attie, who are penning that "73rd episode" called "Swiss Diplomacy."
"'West Wing' wizard"
by Heather Salerno
October 6, 2002
Journal News
"It was supposed to be a one-episode deal, but they said I'm coming back for several more," the actress [Danica McKellar] says by phone from Los Angeles.
"She's past 'Wonder Years'"
by John Kiesewetter
October 29, 2002
Cincinnati Enquirer
"I started out with a five episode contract," the 37-year-old [Joshua Malina] tells TV Guide Online. "It was 'five and we'll see' - and finally, we saw. ..."
"Sports Night Star Replaces Rob Lowe"
by Daniel R. Coleridge
February 5, 2003
TV Guide Online
Malina was initially signed for a half-dozen episodes. "The way Aaron put it originally, probably to spare my feelings, was, 'We'll see whether you're happy. Whether we're happy.' As if there was much chance that after six episodes I was going to go, 'You know it's not working out from my point of view. I don't want to continue!"'
"Josh Malina has been clever add to West Wing"
by Bridget Bynre
April 19, 2004
Canadian Press