In the Allied campaign, after you rescue President Dugan from Yuri's mind control, he showers you with praise and promises to promote you to... whatever you like... except for President of course.
In the Allied campaign, after Washington D.C. is occupied by the Soviets, the U.S. forces are forced to evacuate to Canada; General Carville isn't too happy about it:
General Carville: I know, Canada... More cows up here than people...
Which leads to this bit in a later mission briefing, when the Allied forces make their move to retake D.C.:
General Carville: I'm tired of hangin' out in Canada. [points a miniature gatling gun statue at the player] General Carville:Get me my office back!
This is the first game in the series that allows you to garrison civilian structures to add to your infantry's offensive and defensive power. Any building can be garrisoned, from office buildings or the Pentagon to fast-food restaurants. But what puts it in this section is the fact that when you garrison a building, it visually changes: sandbags appear, barbed wire, barricaded windows... even appearing on a Port-A-Potty. Some of the fast food mascots like McBurger Kong can bandannas and machine guns!
Einstein takes the cake in Mirage, one of the late missions in the Allied campaign. Every time soviet forces approach the Chronosphere, he interrupts the communication between the player and Eva, who gets increasingly annoyed about this.
Dugan appears to be a bit too chummy with his secretary, who happens to be suspiciously reminiscent of Monica Lewinsky.
Romanov's Villainous Breakdown after the missile silo is destroyed in the second last allies mission.
Romanov: Your time is up!You'll pay for this!(about to tear up)Very soon!
In the first Soviet mission in the expansion pack, your forces hijack a time machine with the intent of altering the past in their favor. The time machine powers up, there is a bright flash... and you find yourself face-to-face with a dinosaur.
(Zofia taps a control panel, frowns, and taps it again before a concerned look crosses her face)
When Romanov's plane gets shot down over Morocco your goal is to find him. Where is he? A Cabaret, having drinks served to him by a belly dancer. Not only that that - he's at Rick's Place!
Yuri's fate in the Soviet ending in the expansion. You know how you accidentally went back in time to the Cretaceous by using too much power? When Yuri jacks the Time Machine, Zofia sends him there on purpose.
Zofia: We still have the Time Machine's command codes, comrade general. (evil smirk) I have overridden the controls and released all of the energy reserves. If you remember, we ourselves have had some difficulty when too much energy was channeled into the machine...
General Carville's reaction to the "Floating Disk" unit when it first appears:
Carville: Holy cow! Commander, we got some kind of UFO on the scope. Either it's an alien invasion, or Yuri's been watching too much TV.
Tanya objects to the praise given to Boris by mission control.
Tanya: What? [laughs] Yeah, right, Boris is skilled. Look at me, I can call in an airstrike! Please...
Upon hearing about a base in Transilvania, Romanov mocks Yuri's theatricality with some of his own.
Romanov(Doing the Frankenstein gait) He is like monster from movies, yes?
Also, Romanov's speech at the beginning of the Moon mission.