| Rob Lowe as | Sam (Samuel Norman) Seaborn | Democratic Candidate in California 47th |
| 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 | Deputy Communications Director |
| 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 |
| with John Amos as |
Admiral Percy "Fitz" Fitzwallace | Chairman of the Joint Chiefs |
| Guest Starring | ||
| Kathleen York as | Rep. Andy (Andrea) Wyatt | Congresswoman |
| Elisabeth Moss as | Zoey Patricia Bartlet | Bartlets' youngest daughter |
| Matthew Glave as | Scott Holcomb | Sam's Campaign Manger |
| Danica McKellar as | Elsie Snuffin | Will Bailey's Stepsister |
| Renée Estevez as | Nancy | Aide |
| Trent Ford as | Jean Paul FULL NAME | Zoey's Boyfriend |
| NiCole Robinson as | Margaret | Hooper (last name) / Assistant to Chief of Staff |
| Claire Coffee as | Cassie Tatum | Intern #24 |
| J. Patrick McCormack as | General Jimmy Wendall | |
| Henry G. Sanders as | Ambassador Tiki | |
| Alex Hyde-White as | Man who accosted Andy | |
| Rick Najera as | Ivan "Izzy" Perez | California Agricultural Laborers Association |
| Co-Starring | ||
| Melissa Fitzgerald as | Carol | Fitzpatrick (last name) Assistant to the Press Secretary |
| Timothy Davis-Reed as | Mark | O'Donnell (last name) / Reporter |
| Charles Noland as | Steve | Reporter |
| Peter James Smith as | Ed | Congressional Liaison |
| William Duffy as | Larry | Congressional Liaison |
| Kim Webster as | Ginger | Assistant to Communications' Director |
| Kris Murphy as | Katie | Witt (last name) / Reporter |
| Penny Griego as | CNN Anchor | |
| Ron Ostrow as | John | Reporter |
| Stephanie Venditto as | Jenn | Reporter / previously June Wheeler |
| John Lathan as | Aide to Tiki | |
| Lara Phillips as | Lauren Romano | Intern #60 |
| Kimberlee Peterson as | Lauren Shelby | Intern #21 |
| Michael T. Kachingwe as | Robbie | in Leo's meeting |
| Lee Hampton as | Thomas | in Leo's meeting |
| Laura Henry as | Betty | accosted Andy, Toby and Charlie |
| Catherine Kwong as | Lauren Chin | Intern #48 |
| John Leslie Wolfe as | GOP Leader | |
| J. Todd Adams as | Seaborn Aide | |
| John Michael Prendergast as | Aide #2 | Seaborn Aide |
| Stephen Mendel as | Speaker | |
| Ben Lang as | Lieutenant | |
| Rocky McMurray as | Officer |
... but his [Rob Lowe's] Sam Seaborn character has been so scarce that he's turned up on a milk carton -- a joke gift Lowe sent castmates and execs at NBC and Warner Bros. His mug's on the back of a real half-gallon container, under "Missing Persons." Along with listing Seaborn's vital stats, the carton informs he's been "Missing since Christmas episode 2002" and was "Last seen, Edison Field, upper deck," where Lowe was seen during the World Series. "Please call Bernie Brillstein if you've seen this man," the carton implores.
"The "Great" race is shifting into high gear"
by Michael Fleming
January 17, 2003
Variety
Many "West Wing" viewers will be happy to know that they'll still have Rob Lowe's character, Sam Seaborn, to kick around for at least one more episode. Aaron Sorkin, the writer-creator of the series, said he is preparing a script that will include Seaborn and will air during the February sweeps. Asked if the February script will be the end of Lowe, Sorkin said: "I hope not."
"Much ado about 'Kingpin'"
by Alan Pergament
January 22, 2003
Buffalo News
Mr. Lowe said he expected a bigger sendoff in his fourth and final West Wing season. Instead, his character all but vanished before returning for two concluding episodes last month."It got a little confusing -- and quite simply a little confusing to me -- when the producers decided not to use me for the 16 episodes they did have me. But it was one of the greatest paid vacations I've ever had. I traveled the world and had a great time."
"Lowe's moving beyond politics with no regrets"
by Ed Bark
March 14, 2003
Dallas Morning News
President Roh Moo-hyun on Thursday compared domestic political environment with the U.S. one by illustrating his favorite television program during his important news conference.Roh introduced an episode of the "West Wing", in which a U.S. president gives a campaign speech for his party candidate for a U.S. House of Representative election in California.
"We should throw away with double standard," Roh said. "The President is a politician."
His remarks come as the election watchdog requested that Roh should be politically neutral as a public servant. The National Election Commission (NEC) ruled early this month that President Roh's open support for pro-government Uri Party violates election laws.
"President Refers to "West Wing""
by Yoon Won-sup
March 11, 2004
Korean Times