President Frank Underwood's loyal supporters at Fansided have put their math skills to use to determine when "House of Cards," the Netflix hit series starring that ominous leader of the free world, might make a return to TV screens next spring.

The show's fourth season will likely premiere in March of 2016, the website predicted as it pointed to a pattern that has held true throughout the political drama's history: The second season was released exactly one year and 13 days after the first one (Feb. 14, 2014 vs. Feb. 1, 2013), and the third one exactly one year and 13 days after the second one (Feb. 27, 2015 vs. Feb. 14, 2014).

"With that formula, we'll see 'House of Cards' Season 4 on Netflix March 11, 2016," writer Jack Jorgensen calculated. "This is assuming that they'll go this route again," he cautioned, "but after using it twice already, there's little reason to assume that they won't."

While fans are counting the days and speculating about what turns the "House of Cards" story may take in the next season, Kevin Spacey and the show's cast are working on putting it all together. And for filming that will take place in the Maryland area, the series' team is now looking for extras, the Baltimore Sun reported.

"Marinella Hume Casting is looking for extras to work on the final episodes of Netflix's 'House of Cards' season 4 now filming in Baltimore," producers revealed in a statement. "Casting directors are looking for reporters, photographers, videographers, and boom operators to work on the upcoming scene."

"House of Cards" fans who aspire to be more than just extras and hope to one day follow in Spacey's footsteps, meanwhile, will soon be able to take online acting lessons from their idol, Digital Spy noted.

For $90, students can take a virtual class that includes 29 video lessons and a 40-page workbook in an effort to "engage in the craft of acting ... that has won him (Spacey) two Academy Awards," the Masterclass offer detailed.