Discussing the final episode of the show's fifth run, Denton described the story as "really creepy".
In an interview with E! Online, the actor said of Dave's revenge on his character Mike Delfino: "It's more creepy than going after Susan. It's actually a little scarier than that."
He also revealed that he believes Dave will not make it out of the finale alive.
"I don't see how he can. What he does is so wrong," he said." I'm afraid we're going to lose another great actor because I don't know how we can keep him around.
"He's too evil. What he does is pretty despicable."
Hatcher, who plays Susan Mayer, added: "You should be worried. It's an ending with lots of peril, but it's not just Susan who's involved."