| Rob Lowe as | Sam (Samuel Norman) Seaborn | Deputy Communications Director |
| 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 | ||
| Mary-Louise Parker as | Amy (Amelia) Gardner | Political Operative |
| Joshua Malina as | Will (William) Bailey | Former Campaign Manger |
| with John Amos as |
Admiral Percy "Fitz" Fitzwallace | Chairman of the Joint Chiefs |
| and Christian Slater as |
Lieutenant Commander Jack Reese | |
| Guest Starring | ||
| Vyto Ruginis as | Mitch | News Magazine Reporter |
| Audrey Wasilewski as | Janice Trumbull | Star Trek Fanatic |
| Renée Estevez as | Nancy | Aide |
| Co-Starring | ||
| Ron Ostrow as | John | Reporter |
| Timothy Davis-Reed as | Mark | O'Donnell (last name) / Reporter |
| Kris Murphy as | Katie | Witt (last name) / Reporter |
| Melissa Fitzgerald as | Carol | Fitzpatrick (last name) Assistant to the Press Secretary |
Wondering what it would take for Christian Slater to accept a spot on series television? Two words: Aaron Sorkin. "Aaron called and offered me the role, and it was something I just could not say no to. I just love that show. Love it."Slater's talking, of course, about The West Wing, in which he'll appear November 6 for the big election-day episode. When prodded about his character, Slater was a bit tight-lipped but did offer this: "I know Aaron said I'm a good guy, but the way he writes, you just never know. Still, he did allude to the fact that I was a good guy...and I think I'd prefer to be on the right side."
"Halloween Spoiler Surprises, a Firefly Plea--and a Quickie with Kiefer"
by Wanda
October 25, 2002
E! Online
Rob Lowe is leaving "The West Wing" tonight without knowing if his character will get elected to Congress."I'll probably find out the same time as viewers do," the Santa Barbara star said, laughing during a phone interview with The Star on Monday.
"Lowe leaves 'West Wing' for whatever's next"
by Dave Mason
November 27, 2002
Ventura County Star
"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
Sorkin was inspired by a Trekkie button [Paula] Yoo wore that she asked her to write about a conflict between Deputy Chief of Staff Joshua Lyman (Bradley Whitford) and a Star Trek fanatic sporting a Trekkie button and flaunting White House dress code.
"'Sixteen' for Sammy and Yoo"
by Samson Wong
May 27, 2005
Asian Week