Chuck accidentally runs into a fellow government agent who seems to be living a similar life. It turns out this agent is a gadget whiz, whose brain makes him a national security asset and a dangerous liability, much like Chuck. Chuck faces a predicament whether he should help turn this agent into Sarah and Casey or help this agent escape his handlers.

Meanwhile, Halloween, a holiday that means a lot to Chuck and Morgan as buddies, proves to be a little different this year as Morgan feels that Chuck is neglecting both their childhood and friendship. 

original airdate-October 29,2007                 rating- 7.03 Million

songs--Theme Song: "Short Skirt / Long Jacket" by Cake

1. "All Right Now" by Free
2. "The Weight Of The World" by Editors
3. "When Johnny Comes Marching Home (instrumental)"
4. "Dice" by Finley Quaye
5. "It Takes Two" by Rob Base and DJ EZ Rock.