House of Cards Season 4 is now in the process of being filmed. Curiously, there is a request for medical personnel to fill in as extras. In the meantime, the release date has been confirmed for 2016.

Potential Release Date

For three consecutive seasons, House of Cards premiered on a Friday in the month of February. However, the seasons' release dates were 13 days apart.  For instance, the first season debuted on Feb. 1, 2013. The second season was released on Feb. 14, 2014, while the third was launched on Feb. 27, 2015.

Based on this release cycle, the season 4 release date may fall on Friday, March 11. Naturally, this is based solely on theory. Anything can happen in the time leading up to the release date.

Real Doctors, Nurses and Medical Specialists Needed

Though story details for Season 4 are murky, there will be a scene involving doctors and nurses that will be filmed on Wednesday. The House of Cards production team is asking for extras who either have medical experience or bear professional resemblance.

This latest casting information comes straight from The Baltimore Sun. Interested parties will need to email up-to-date photos in focus and against plain backgrounds.Participants may be asked to work more than 12 hours in one day.

What We Know So Far Regarding Plot

During the season three finale, Claire walks out on Frank Underwood during his preparations for reelection as U.S. President. It is unclear what will happen between the two characters in Season 4.

Though this is not the first estrangement for Claire and Frank, the recent conflict seems to be more serious. In future episodes, Frank faces an uphill battle just as many of his former allies (namely Remy and Jackie) have turned against him.

Next season, the audience should expect to see Doug Stamper carrying out more dirty work for the embattled POTUS Frank Underwood.

In season three, viewers watched as Doug seemingly redeems himself - first by recovering after an alcoholic relapse, and second by reconnecting with his brother. Emotions ran high as Doug tells his sibling that he loves him. Just as the third season came to a close, Stamper turns around and murders Rachel to reaffirm loyalties with Frank Underwood. The familiar-but-heartless Doug Stamper has returned. 

Meanwhile, there is talk concerning a new member of the cast - Neeve Campbell. In June, Deadline predicted that Campbell may be part of young power couple that will emerge just as Frank and Claire's relationship is on the rocks. Campbell has quest starred in Mad Men, and is taking part in the second season of Welcome to Sweden.