Walking and talking with some famous faces.

J.K. Simmons (Harry Ravitch)

J.K. Simmonsfound a spot inThe West Wing’s final season.

Amy Adams (Cathy)

Amy AdamsjoinedThe West Wingin the show’s fourth season.

Nick Offerman (Jerry)

NBC

Dennis Haskins (CEO Donor No.

She played Chief Justice Evelyn Baker Lang, a judge being considered for the Supreme Court.

The famed musician was shown performing at the Congressional Christmas party.

J.K. Simmons (Harry Ravitch)

NBC

Laura Dern (U.S.

Poet Laureate Tabatha Fortis)

Laura DernjoinedThe West Wing’s third season as U.S.

Poet Laureate Tabatha Fortis.

Liza Weil (Karen Larson)

NBC

Cregg’s niece, Hogan, whom the press secretary takes shopping for a prom dress.

Rachael Harris (Corinne McKenna)

Rachael HarrisjoinedThe West Wing’s sixth season as Corinne McKenna.

She played a Wind Now representative who participated in Josh’s Alternative Energy Summit at the White House.

Danny Pudi (Unnamed Aide to Matthew Santos)

NBC

Simpson’s Alan Dershowitz, Evan Handler played Douglas Wegland in three episodes ofThe West Wing.

The character found himself in the midst of a crisis when Zoey Bartlet (Elisabeth Moss) was kidnapped.

Eric Stonestreet (Staffer No.

Amy Adams (Cathy)

NBC

He became the Republican nominee for president, running against President Bartlet.

Robot,Christian Slaterappeared in three episodes ofThe West Wing.

He played a Rotarian who met with Sam (Rob Lowe) about a national seat belt law.

Dennis Haskins (C.E.O. Donor #2)

NBC

He portrayed the real-life Constitution expert, who came in to help the White House.

He played a college professor of Sam’s, who came to speak to his former student about supercolliders.

She met with Toby to discuss Social Security and the retirement age.

Gabrielle Union (Meeshel Anders)

NBC

James Taylor (James Taylor)

Mitch Haddad/NBCU Photo Bank

Connie Britton (Connie Tate)

NBC

Bellamy Young (MaryLou Meriwether)

NBC

Jane Lynch (Unnamed Reporter)

NBC

David Burtka (Intern Bruce)

NBC

Glenn Close (Chief Justice Evelyn Baker Lang)

NBCU Photo Bank

Yo-Yo Ma (Yo-Yo Ma)

NBC

Jon Bon Jovi (Jon Bon Jovi)

Justin Lubin/Warner Bros./Getty Images

Laura Dern (U.S. Poet Laureate Tabatha Fortis)

NBC

Evan Rachel Wood (Hogan Cregg)

NBC

Rachael Harris (Corinne McKenna)

NBC

Evan Handler (Douglas Wegland)

NBC

Taye Diggs (Secret Service Agent Wesley Davis)

NBCU Photo Bank

Eric Stonestreet (Staffer #1)

NBC

Felicity Huffman (Ann Stark)

NBC

James Brolin (Governor Robert Ritchie)

NBC

Penn and Teller (Penn and Teller)

Mitchell Haddad/NBC via Getty Images

Christian Slater (Lieutenant Commander Jack Reese)

NBC

Ty Burrell (Tom Starks)

NBC

Christopher Lloyd (Professor Lawrence Lessig)

NBC

Hector Elizondo (Dr. Dalton Millgate)

NBC

Kate Burton (Sarah Brainerd)

NBC

Jeff Perry (Burt Ganz)

NBC