As Bartlet and his staff arrive in China for a critical summit, he is still suffering from the paralyzing side-effects of MS. Meanwhile, an asteroid is headed for the U.S., leaving Josh and Leo to deal with the potential consequences. Josh is distraught after Donna quits her job.
- Stockard Channing as Abbey Bartlet
- Dulé Hill as Charlie Young
- Allison Janney as C.J. Cregg
- Joshua Malina as Will Bailey
- Mary McCormack as Kate Harper
- Janel Moloney as Donna Moss
- Richard Schiff as Toby Ziegler
- John Spencer as Leo McGarry
- Bradley Whitford as Josh Lyman
- with Jimmy Smits as Matthew Santos
- and Martin Sheen as President Jed Bartlet
Special Guest Stars
- Mary Kay Place as Dr. Millicent Griffith
- Ron Canada as Ted Barrow
- NiCole Robinson as Margaret Hooper
- Patrick Fischler as Walter Sprout
- Cleo King as Marla Whorisky
- Kim Webster as Ginger
- Ben Murray as Curtis Carruthers
- William Hootkins as U.S. Translator
- Willie Gault as Secret Service Agent Michael Madsen
- David Grant Wright as Edwin Kelwick
- Raymond Ma as President Lian
- James Kyson Lee as Chinese Translator
- Ping Wu as Chinese Official
- Jonathan Brent as White House Photographer Jim
- Janette Kim as New Reporter #1
- This is the first episode of the season to feature the entire main cast of the show.
President Bartlet: I'm just saying, you drop me, that's a moment that follows you the rest of your life.
Leo McGary:: There are no stupid ideas. Actually there are, I don't know why people say that.