In the last episode of "Marvel's Agents of S.H.I.E.L.D.," we learned that Agent Skye (Chloe Bennett) has been imbued with Inhuman powers and quarantined while her DNA was being analyzed. However, after the episode was aired, new teasers were released and it seems that a favorite from the Marvel Cinematic Universe will be making an appearance.

In episode 12, Coulson and the team will try to help guest star Jaimie Alexander as the confused Lady Sif, who, according to Comic Book, lost her memory after a fight with a mysterious warrior whose mission would rattle S.H.I.E.L.D.

The full synopsis, as printed on Screen Rant read: "Coulson and team come to the aid of a confused Lady Sif, who has lost her memory after fighting with a mysterious warrior whose true mission will send shockwaves through S.H.I.E.L.D. Meanwhile, Bobbi and Mack continue to hide their true mission from everyone close to them."

The website noted that although she first appeared in the series in Season 1, Sif's last appearance did not help with the plot, but rather helped develop the characters on Coulson's team. Her return, however, will help offer insight about Skye's transformation as an Inhuman, and will give more impact to the team's storyline.

Of course, the series has taken another turn, and it's not yet sure how Sif's appearance will fit into the series, however, "Marvel's Agents of S.H.I.E.L.D." has become more integral in the MCU, which could mean that her return will be met with better reviews.

Check out the teaser here:

Meanwhile, the network has also released several photos for episode 13, called "One of Us."

According to the synopsis, as printed on Flickering Myth website, "Cal seeks revenge on Coulson by assembling a team of Super Villains to destroy S.H.I.E.L.D. Meanwhile, May calls on renowned Dr. Andrew Garner (Blair Underwood), her charismatic ex-husband, with a crisis that threatens to tear the team apart."

The series stars Clark Gregg as Director Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Grant Ward, Chloe Bennet as Agent Skye, Iain De Caestecker as Agent Leo Fitz, Elizabeth Henstridge as Agent Jemma Simmons, and Nick Blood as Lance Hunter. Episode 12 guest stars Adrianne Palicki as Bobbi Morse, Henry Simmons as Alphonso "Mack" Mackenzie, Jaimie Alexander as Lady Sif.

"Who You Really Are" was written by Drew Z. Greenberg and helmed by Roxann Dawson, will air on March 10. "One of Us" will air a week after, on March 17.