In Fahrenheit 451, Captain Beatty seems to have control over Montag. Is there a point (or points) in the novel where this is most evident? Quotes would be very helpful.
In the section of the novel titled "The Hearth and Salamander," Beatty comes to visit Montag at his home. He gives Montag a big, huge convoluted speech about books, book burning, and the need for firemen.
The entire sequence shows that Beatty is exerting control over Montag. It's not an equal conversation between two intellectuals. It's a lecture being given by Beatty to Montag. Much of it jumps around and is confusing. That may be because Beatty can't string it together coherently, or he is try to deliberately trip up and confuse Montag. I believe it is the second, because that is one way of belittling your "opponent" -- confuse them.
The next time Montag shows up for work, Beatty greets him so all can hear with this line:
"Well," he said to the men playing cards, "here comes a very strange beast which in all tongues is called a fool."
Beatty then begins to string together a bunch of contradictory quotes from literature to further confuse Montag. That's further manipulation and control. He's using insults and confusion.
The last solid piece of evidence that I can give is what happens next. The fire alarm goes off, and Beatty drives the firetruck to the location, which Beatty has never done before. He is controlling the truck, and therefore where Montag is going -- which is Montag's own house.