Series creator Haas also discussed the finale and potential for a second series with TV Insider.
Explaining Grant Harvey's character Todd targeting Oliveras, he said: "Well, he does see her at the bar, and he thinks, 'That's the most vulnerable member I could pick off,' not knowing what she's capable of, but as a hunter, sometimes you go for the member you think you can take down of the flock with the least resistance.
"You find out that he's pinning all of this on someone else. So I think that's part of his plan, but that part of the plan might be his undoing."
Cryptically referring to Todd's intentions, the creator hinted: "He's going to shoot her. That's the plan. Will he? We're going to wait and see.
"If the dog was a test run and we, the audience, don't know the end result to that, even though we talked about it, then this is not good for Oliveras' future."
It seems Haas has remained tight-lipped on whether the season will go ahead, simply telling viewers to "stay tuned".
However, he previously admitted that he was "feeling good" about the show, saying: "It feels like we continue to pick up viewers every week and so that gets me all excited."
The synopsis for Countdown reads: "When an officer with the Department of Homeland Security is murdered in broad daylight, LAPD detective Mark Meachum, portrayed by Ackles, is recruited to a secret task force, alongside undercover agents from all branches of law enforcement, to investigate.
"But the hunt for the killer soon uncovers a plot far more sinister than anyone could have imagined, kicking off a race against time to save a city of millions."