It is revealed that the woman Sarah shot as part of her red test was Daniel Shaw's wife Evelyn Shaw.
Despite the fact that Casey was dismissed and denied access to the Castle, as seen in previous episodes, in this one, Sarah calls for his help through morse code, and seconds later he can be seen inside the castle as if he still had complete access to it.
"At The Checkout Counter" by Billy Martin (Casey and Morgan talk to Chuck at the Buy More)
"Down River" by The Temper Trap (Chuck reveals his feelings to Sarah; Casey tells Sarah the truth)
(Sarah refuses to join Chuck's team and then Chuck decides to quit)
Casey: There goes our chance to ever get out of the Buy More.
Morgan: Really? Is that what they teach you in the Marine Corps? Hmm? Roll over and die?
Casey: This isn't exactly combat, Morgan.
Morgan: That's where you're wrong, Casey. Because love..love is a battlefield.
Chuck: Wasn't this the plan? There's nothing stopping us from being together now. I passed my spy test.
Sarah: That's why I can't be with you, okay? You're not... you're not the same guy that I fell for.
Chuck: How? Why? Because I'm an agent now? How am I not the same guy?
Sarah: You killed somebody, Chuck. I saw you kill the mole!
Chuck: Sarah, I know what you think you saw on the train tracks, but it's not that simple. It's more complicated than that, and I need you to believe me.
Sarah: I don't.
Chuck: (To Sarah) And since I've already given the fancy eloquent version of this speech before, right now I'm just gonna be blunt and honest. I love you. One more time just because it feels really nice to say it: I love you. I feel like I've been bottling this up forever: I love you.
General Beckman: (to Chuck) For God's sake, put that gun away. You're a spy now.
Morgan: Man down! I've been tased. I can't feel my legs. Bring a stretcher, a wheelbarrow. Possibly change of pants.
Ellie: Hold on for a minute. You guys expect me to believe that the three of you got my husband beat up and tossed in jail to save my brother's love life?
Awesome: Yes. Yes we did.
Casey: We're as shocked as you are.
Jeff: It's insulting. Do they have any idea how much stalking experience I have?
Lester: If only they did, Jeffrey. You're very prolific. You're the--the Picasso of creepiness.
Jeff: It's true. And this is my Blue period.
Jeff: Stalker's log. Stalkee is behind a gray van with another male, possibly for a sexual encounter. Both men are physically fit. Should be lively.
Lester: Jeffrey? Don't make me afraid to be alone with you.
International Episode Titles:
Czech Republic - Chuck a americký hrdina (Chuck and the American Hero)
The picture of the luxury Italian villa where the CIA wants Chuck to stay at while undercover in Rome is actually a picture of Flagler College in St. Augustine, Florida.
Although credited, Mark Christopher Lawrence (Michael "Big Mike" Tucker) does not appear in this episode.
Original International Air Dates:
Canada: March 29, 2010 on Citytv
United Kingdom: August 16, 2010 on Virgin 1
Czech Republic: December 12, 2010 on Prima COOL
Sweden: January 3, 2011 on TV6
Finland: July 23, 2012 on Sub
Since Brandon Routh previously played an American hero in Superman Returns, that may have been the reason for this episode's title.