Before Marvel's 'Agent Carter' airs its Season 1 finale on February 24, fans will discover which top secrets will be revealed regarding Agent Peggy Carter and Howard Stark's anger-inducing weapon of mass destruction after the plot was recently leaked online.

Marvel's 'Agent Carter' will air Tuesdays at 9:00 pm ET and can be watched online through live stream via the link provided below.

"Peggy faces the full fury of Leviathan, as Howard Stark makes his return in the explosive season finale of "Marvel's Agent Carter," according to the official summary for Episode 8.

In the upcoming episode Howard Stark (aka Tony Stark/Iron Man's father) will play a major role when Peggy battles USSR spy Dottie Underwood and the rest of the Soviet secret agency, the Leviathan in the finale.

"A very big role. He (Howard Stark) actually puts himself at risk in the finale. Despite the fact that he's a confident guy and an arrogant guy, he has a lot of guilt about his involvement in all of this," said series Executive Producer Michele Fazekas to Entertainment Weekly in a recent interview.

"He will actually put himself at risk, but you will still see him doing things that are self-serving. His resolution in the last episode is also tied in with Peggy's resolution for her whole personal arc for the season."

In addition, Fazekas also revealed that the series may end with a cliffhanger, which may lead to a possible second season in the near future.

"The immediate problem with Leviathan is dealt with, but in the future the bigger picture is still out there...,"said Fazekas. "There are a couple of things that are very nicely resolved in both the case and Peggy's personal life, but there are loose ends that are very obvious that could play in future seasons."

Marvel's 'Agent Carter' airs every Tuesdays at 9 pm ET and can be viewed on the ABC TV network or online through live stream by clicking here.