| 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 Star Mary-Louise Parker as |
Amy (Amelia) Gardner | Stackhouse Staffer |
| Guest Starring | ||
| Clark Gregg as | Special Agent Michael Casper | "Mike" / FBI |
| George Coe as | Senator Howard Stackhouse | |
| Malachi Throne as | Ben Yosef | Israeli official |
| Deborah May as | Janet | |
| Robin Bartlett as | Susan Thomas | Stackhouse Staffer |
| Andrew McFarlane as | Anthony Marcus | Simon's Little Brother |
| John Cothran, Jr. as | Civilian Advisor | |
| NiCole Robinson as | Margaret | Hooper (last name) / Assistant to Chief of Staff |
| Larry Brandenburg as | Senator Michael Jackson | Stackhouse meeting |
| Co-Starring | ||
| Kim Webster as | Ginger | Assistant to Communications' Director |
| Hilary Salvatore as | Emily | |
| Kris Murphy as | Katie | Witt (last name) / Reporter |
| Becky Meister as | Sally | Reporter |
| Ralph Meyering Jr. as | Civilian | Tom |
| Richard Green as | Jerry | Oval Office meeting |
| Lynn Tufeld as | Grace | Oval Office meeting |
| Joe Marinelli as | Morris | Oval Office meeting |
| Brandon Noll as | Staffer | |
| Joe Cosgrove as | Cardinal | |
| Noel Conlon as | Weaver | Secretary Jason (first name) / Stackhouse meeting |
| Helen Duffy as | White | Senator / Stackhouse meeting |
"You're going to see opposition on the show, and you're going to see them making strong, compelling arguments. In our parallel West Wing universe, which is two years off from the actual universe, Bartlet's going to need to start running for re-election. And he's facing all kinds of opposition -- including, by the way, opposition to his left." - Aaron Sorkin
"New opponents to besiege 'West Wing'"
by Eric Deggans
February 6, 2001
St. Petersburg Times
He [Aaron Sorkin] also hopes to put Bartlet on a train for the first six episodes of that fourth season, taking the show on the road for a series of whistle-stops "all over the country."
"Sorkin's drug subplot ending"
by Ed Bark
July 22, 2001
Dallas Morning News
On that topic, the CFL is getting a lot of exposure on US television these days, and not just on the network carrying weekly games. A while ago, the game was featured on the hit TV show, The West Wing."It was one of the episodes called the Red Mass," explained Shawn Lackie, Vice-President of Communications. "It's a clip that has the President, (played by Martin Sheen) sitting in his office talking about the upcoming campaign, and they kept using football analogies. They keep talking about this guy keeps throwing screen passes and he shouldn't. All the time he's talking, you can see a game in the background, and all of a sudden, boom, you can clearly see a shot of a Calgary Stampeders helmet.
How did CFL game action end up on The West Wing? "There are a lot of people interested in the CFL, because buying NFL footage can sometimes be prohibitive," said Lackie.
"Around the CFL - Flutie honored"
by Ted Michaels
October 28, 2002
sportsnetwork.com
"I think some of that was the election [story line], some of these were not our best episodes, some of it was that we got hit with 'The Bachelor' and people started to leave, given an excuse," [Thomas] Schlamme said.
"Shedding light on murky look of 'West Wing'"
by Phil Rosenthal
January 15, 2003
Chicago Sun-Times
"There were some decisions made about the election that didn't have much dramatic punch," says [John] Wells. "You knew Bartlet was coming back. And that story line coincided with a wave of successful reality-TV programming."
"The West Wing"
by Allison Hope Weiner
September 12, 2003
Entertainment Weekly