"Chuck Versus the Bullet Train" picks up where last week’s episode left off.

Quinn (Angus Macfadyen) has captured Chuck (Zachary Levi) and asks him to fix the Intersect, which is "en route to his base." Quinn also informs Chuck that Sarah (Yvonne Strahovski) and Casey (Adam Baldwin) are dead. In fact, Sarah, using her new Intersect skills, has defeated Quinn’s men, has sent the false message confirming that she and Casey are dead, and has made arrangements for their bodies to be on the same bullet train that Quinn and Chuck are on.

Sarah, using her new Intersect powers, saves Chuck and captures Quinn. Chuck and Sarah share a moment about how amazing it is to have the Intersect, and then sketch out their future life together, complete with picket fences. However, Quinn has two of this henchpeople capture Alex, and then uses her to force Casey into helping him escape. A fight ensues and Sarah, unable to control the Intersect, attempts to kill Quinn.

Back at the Buy More, Ellie (Sarah Lancaster) is working with Morgan (Joshua Gomez) and Devon (Ryan McPartlin) to try and understand why the Intersect damaged Morgan’s brain, and hypothesizes that flashing too frequently places too much strain on the brain, and that this resulted in Morgan’s behavior change and memory loss.

Devon and Morgan are texted by Chuck (at Casey’s request) and alerted to Alex’s kidnapping. They attempt to save her but are intercepted by one of the kidnappers. Jeff (Scott Krinsky) and Lester (Vik Sahay), still convinced that something is going on but unable to remember any of their discoveries from last week, are following Devon and Morgan, and find up the earwig that Morgan is using to communicate with Casey after Morgan is captured.

Casey, after a quick conference with Chuck, decides that they are Alex’s best hope, and talks them through a successful rescue attempt, using supplies from his car. Quinn has survived Sarah’s attempt to kill him, and manages to capture Sarah, and reprograms her so that she doesn’t remember any of the last five years of her life.

The end of the episode sees Quinn posing as her CIA handler and giving her a mission to kill Chuck Bartowski, of whom she has no memories.

WHAT WORKED
It was great to see Jeff and Lester finally brought into the fold, and the vision of Lester, dressed in full battle gear complete with cigar, with "Oh Canada" playing in the background, was truly something to behold. Seeing them like kids in a candy store when they finally got to see Castle was priceless too.

The moment between Chuck and Sarah when they both discuss how cool it is to have the Intersect was very well done. Resetting Sarah back to her original state sets the stage for a really interesting episode next week.

WHAT DIDN'T WORK
Introducing Quinn as a supervillain this late in the game seems just doesn’t quite work. His quest for vengeance feels forced –- he hasn’t been around for the last five seasons, and was never even referenced, so to have him suddenly written in as the original intended recipient of the Intersect who has been scheming and plotting all this time doesn’t feel quite right.

Sarah has always been portrayed as an extremely capable spy, able to keep up with the intersect. Why, then, when she gets the Intersect, is she incapable of acting without it? Flashing 40 times since getting the intersect doesn’t feel like something Sarah would do.

GIVING CREDIT WHERE CREDIT IS DUE
"Chuck Versus the Bullet Train" was written by Nicholas Wootton and directed by Buzz Feitshans IV.

"Chuck" airs Fridays at 8 p.m. ET on NBC.