| Dulé Hill as | Charlie (Charles) Young | Personal Aide to the President |
| Allison Janney as | C.J. (Claudia Jean) Cregg | Press Secretary |
| Joshua Malina as | Will (William) Bailey | Vice President's Chief of Staff |
| 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 | ||
| John Goodman as | Glenallen "Glen" Walken | Former President |
| James Cromwell as | President D. Wire "D.W." Newman | Former President |
| Guest Starring | ||
| Michael Hyatt as | Angela Blake | from New York |
| Stephen Tobolowsky as | Dr. Max Milkman | from DARPA |
| Terry O'Quinn as | General Nicholas Alexander | Chairman of the Joint Chiefs |
| Allison Smith as | Mallory O'Brian | Teacher / Leo McGarry's daughter |
| Ron Canada as | Theodore "Ted" Barrow | Under Secretary of State |
| Diana Douglas as | Libby Lassiter | Former First Lady |
| Steve Ryan as | Miles Hutchinson | Secretary of Defense |
| Maz Jorbrani as | Prince Bitar | of Saudi Arabia |
| Bellamy Young as | MaryLou Meriwether | North Carolina Lawyer |
| Ryan Cutrona as | George Sliger | previously Rollie / CIA Director |
| David Andriole as | Ralph Fairfax | Connecticut Lawyer |
| Co-Starring | ||
| Melissa Fitzgerald as | Carol | Fitzpatrick (last name) Assistant to the Press Secretary |
| Kris Murphy as | Katie | Witt (last name) / Reporter |
| Devon Michaels as | Randal Fierstin | Backslash Magazine |
| Don Fischer as | Major Castrop | "Lieutenant Colonel" |
| Austin Priester as | Secret Service Agent | |
| Mitch Gibney as | Talking Head |
"I love the personal-relationship side of C.J.," she [Allison Janney] says with a chuckle. "I think I've got the press briefings down pretty much, and I'd love to get into some complicated relationship scenarios."
"Allison Janney is the softer side of C.J. Cregg"
by Jay Boyar
July 29, 2003
Orlando Sentinel
"The West Wing's" John Spencer finds that the show has made a "seamless transition" with super-producer John Wells in charge this season, taking the place of creator Aaron Sorkin.
"One difference between the writers we have now and when Aaron was writing is that we do get our (script) pages sooner, but the rewrites are more plentiful. But I haven't seen a bad script this year," he adds. "My feeling with Aaron was that while we had to sometimes wait for pages, he was always worth waiting for -- and I still feel that way."
Spencer is glad that the old guard all showed up at the recent party celebrating the 100th episode of the highly-hailed drama series -- including Rob Lowe, who departed the show under a negative cloud, plus director Thomas Schlamme and Sorkin, both of whom left the series last spring.
"It really was great seeing everyone again especially since it was for something this special," declares Spencer.
"Harry Connick Trades 'W & G' for 'Holidays'"
by Marilyn Beck and Stacy Jenel Smith
November 11, 2003
Netscape
James Cromwell will bring his considerable presence to the 100th episode of "The West Wing."The Oscar and three-time Emmy nominee has signed on to appear in the 100th episode of NBC's White House drama, according to The Hollywood Reporter. He'll play a former president, the last Democrat to hold the office before Jed Bartlet (Martin Sheen).
"Cromwell Acts Presidential on 'The West Wing'"
by Unknown
November 12, 2003
zap2it.com
Finally, it's rare that the NHL gets mentioned in a prime-time drama, but did anyone notice that there were three references to the Hartford Whalers in a recent episode of The West Wing? Not bad for a club that moved to Carolina, eh?
"Hall of Fame requests Boucher's equipment"
by Tim Panaccio
January 18, 2004
Philadelphia Inquirer
"Tommy and I wanted to take the show to its 100th episode," Sorkin writes in the new "The West Wing Seasons 3 & 4, The Shooting Scripts" (Newmarket). "But for various reasons of no interest, it was not to be."
"'West Wing' Remains Stellar"
by Roger Catlin
February 4, 2004
Hartford Courant
When Philly-born Josh Singer studied constitutional law at Harvard, he never figured he'd be writing about it for NBC's The West Wing."It blows my mind all the time," says Singer, 33, in his second season as a West Wing staff writer. "I'm incredibly lucky. To be able to write for this show is just crazy."
...
To put it mildly, Singer (Upper Dublin High Class of '90) took a circuitous route to his dream job.
After graduation from Yale and a brief stint at Children's Television Workshop, he earned law and business degrees at Harvard. ("I didn't want to practice law. I just wanted to be able to play with legal concepts.")
Internships at Nickelodeon and the Disney Channel followed. Deciding his destiny was as a writer, Singer penned mock scripts for HBO's Six Feet Under and West Wing.
Normally, the odds of such scripts reaching the top are minuscule. For Singer, however, fortune intervened.
He sublet an apartment in L.A. from a woman whose boyfriend happened to be Lew Wells, a West Wing producer and brother of series honcho John Wells. Lew got the script to John, who offered Singer his first writing job.
"People spend years trying to get their stuff into the right hands," Singer says. Wells "is the best in the business, an unbelievable storyteller."
"Native son forges 'West Wing'-Constitution Center ties"
by Gail Shister
April 26, 2005
Philadelphia Inquirer