S5, E1: As the White House reels from the kidnapping of Zoey (recurring guest star Elisabeth Moss), the youngest daughter of Democratic U.S. President Josiah Edward Bartlet (series star Martin Sheen), the government is temporarily passed from the distraught Bartlet to the Republican party--specifically Speaker of the House Glenallen Walken (recurring guest star John Goodman - "Roseanne," "Barton Fink")--due to the prior resignation of Bartlet's Vice President. First Lady Dr. Abigail "Abbey" Bartlet (series star Stockard Channing) staunchly supports her husband, but the trauma of potentially losing their child forces her to confront Bartlet with the harrowing notion that the crisis was the direct result of the assassination of a dangerous foreign official he ordered months ago. As always, professorial Chief of Staff Leo McGarry (series star John Spencer) serves as Bartlet's political and emotional buttress. Ever present is highly regarded Deputy Chief of Staff Josh Lyman (series star Bradley Whirford), whose capable assistant, Donna Moss (series star Janel Moloney), keeps him grounded. Press Secretary C.J. Cregg (series star Allison Janney) remains cool and competent in the media briefing room, and rumpled Communications Director Toby Ziegler (series star Richard Schiff), focuses on the emergency, even as he quietly celebrates the birth of his twins.