Chuck: "Chuck Vs. The Best Friend"

Anna is back! Hooray! So much eye make-up!
It's been a really long time, and it feels even longer given the recent Chuck shuffling; due to Obama's speech a few weeks ago, the episode that airs tonight was actually meant to go up back then, with the Valentine's Day episode from last week meant to follow this one. As such, if you were paying attention, you probably knew that, after all is said and done, Morgan and Anna will get back together—the V-Day ep started with Morgan telling Chuck that he was happy they both had girlfriends for the holiest of holy days.
Oh well. Tonight's ep is still incredibly enjoyable, even knowing this minorest of spoilers. Morgan is quite upset, as Anna has moved on to another man—so… soon? (I actually don't remember the status of their relationship, or how it came to be that they were broken up.) He recruits the Buy More team to spy on Anna's date, and it's duly discovered that she's actually dating a guy with ties to evil-doings—you can thank Chuck's flash for that. This has a few implications: First, he can't tell anyone from Buy More how he knows this guy is bad news; plus, he's ordered by his bosses to use "connections" to get closer to the new dude. Meaning, he has to fake wanting to go on a double date with Anna, thus stabbing his best friend in the back.
Of course, he does it, and of course Morgan finds out; he had gone on his own to spy-stalk Anna, and sees Chuck getting all buddy-buddy with her. But as Morgan's luck would have it, he accidentally becomes the target of the bad guys Chuck was trying to track—now, they believe sweet innocent Morgan is to blame, and they vow to take him out.