It seems like Peggy Carter's (Hayley Atwell) troubles are far from over as a new set of problems are threatening to come her way. 

In the upcoming episode 4 of "Marvel's Agent Carter," Howard Stark (Dominic Cooper) will return to the series to make her life even more complicated. Peggy is still struggling to keep the men from Strategic Scientific Reserve from finding out that she is working for Stark, while doubting if she was right in trusting him.

In the latest trailer for the episode titled "The Blitzkrieg Button," Carter makes a sharp remark at Stark, saying, "Steve Rogers dedicated his life to this country, not to your bank account." 

The official synopsis for the episode reads: "Peggy may be in more trouble than usual when fugitive Howard Stark suddenly returns for mysterious reasons. And Chief Dooley chases a new clue all the way to Europe that threatens to destroy Peggy's future at the SSR." 

This means that Carter's boss, played by Shea Whigham, is bent on finding out a bit of information about her past that could compromise her current reputation while working for SSR. That information will be gathered when Chief Dooley goes to Europe. 

Aside from the SSR boss, Peggy's co-worker Jack Thompson (Chad Michael Murray) also continues to bother her with questions, claiming that she is up to something. Of course, Peggy does not like Jack's prodding. Will her co-worker find out that she is working as a double agent? 

Meanwhile, spoilers are claiming that Marvel's Stan Lee will be seen in the upcoming episode in a cameo role. According to reports, the upcoming role of the comics writer will amuse fans of the new Marvel TV series, as well as the rest of the Marvel universe. 

"Marvel's Agent Carter" episode 4 will air on Tuesday, Jan. 27.