Re: Your Top Five DS9 Supporting Characters
Dukat leads by a mile in my opinion. He's in the first and last episodes, has about 33 appearances overall, and even when not actually in an episode, still gets mentioned. He's a continual, pervasive threat. And it must have been a relief for Marc Alaimo during Dukat's Bajoran masquerade, to just wear an earring and little nose piece instead of full Cardassian makeup.
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black (1934)