"On Her Majesty's Postal Service" is the third title to parody a James Bond movie.
Glowface: You may have captured me, but you still lost! I beat the X's! I beat the X's!
Glowface: Ten million dollars, and it's all mine! (waits for the X's to appear) All mine! Uh. All mine? This is when the X's would show up, and I'd be like, foolish X's! You can not blah, blah, blah. And Mr. X would be like, we are here to fiendish your blah, blah, blah. Fist, bam, pow! Good times.
Lorenzo: Uh, sir.
Glowface: Oh, yeah, money's mine, money's mine.
Tuesday: I thought his destiny was to be the greatest spy ever.
Truman: What are you, the destiny police?
Mrs. X: Do I hear Tuesday yelling for homework?
Mr. X (slamming open the door): Work, face the wrath of Mr. X!
Glowface: Let's see, it's four to ten. That puts them... five points ahead.
(After Tuesday scores a strike)
Mr. X: Touchdown!
Tuesday: No, no, no! It's a strike.
Mr. X: No, a strike is when you miss three times.
Mr. X: What are you doing here?! Don't look at these codes, they're secret.
Mrs. X: Dear, those are zip codes.
Mr. X: Who told you that?
Truman: Can't he have a hobby or have another kid or something?
Mr.X reads Tuesdays diary in this episode.
We find out Glowface is allergic to Zuccinni.
Title: On Her Majesty's Postal Service is a take on the movie, On Her Majesty's Secret Service.
Mr. X (reading Tuesday's diary): So, Suzie Carmichael is dating Steve Owen.
This is an allusion to Suzie Carmichael from Nickelodeon's Rugrats and All Grown Up.