I agree. Dukat is one of my all time favorite villains and one reason is because he is always, as I sometimes say, teetering on the edge of humanity. He can make you root for him and believe in his redemption, or that he has a lot of good in him but was just led astray by circumstance or ambition or bad judgment. But this episode is when you are forced to face that he is in reality deeply evil. Alaimo does a great job acting the descent into madness, which also reveals Dukat’s true character. And Brooks does a great job of both checking and playing off him. Definitely one of my favorite episodes/scenes.