Because Netflix's political drama "House of Cards" is known for killing off lead characters, fans are worried about the fate of Michael Kelly's Doug Stamper, especially as he recently said he wouldn't put it past the writers to kill off Doug.

"I was alive at the end of three, that's all I can say. I wouldn't be surprised if Beau was behind my bedroom door right now. I put nothing past him," Kelly said of showrunner Beau Willimon, according to Inquisitr.

Kelly's character has had many ups and downs in the past three seasons, and the second season saw him nearly dead when Rachel knocked him on the head with a rock and left him to die. But Doug survives the attack, and in season 3 he gets his revenge by burying Rachel alive.

The actor told Deadline that although the showrunner promised him that his character would survive in season 3, he wasn't so sure.

"It's House of Cards, right? They do not hesitate to kill great characters," Kelly said.

Season 4 of the American political drama, which was renewed in April, has already made new cast additions, and according to a new report, Neve Campbell has joined the cast as a series regular. But we are yet to receive a character description.

The consequences of Claire walking out on Frank will also be something that will be focused in the next season.

"A lot of the strength of the show is based on the strength of that marriage. But as soon as we began to explore that, we realized there was no turning back," creator Willimon revealed to The Hollywood Reporter.

"We also realized we'd laid the groundwork in the previous two seasons for this conflict between Francis and Claire, and the more we began exploring it, the more inevitable it became. And the more exciting it was for us to travel that emotional terrain."

Season 4 of "House of Cards" is expected to be aired in early 2016.