Marvel's Agents of S.H.I.E.L.D. Season 2 Spoilers: Mysterious Blue Alien Identity Revealed?

Marvel's Agents of S.H.I.E.L.D. returns with a new episode tonight entitled "Who You Really Are" that features the return of Jaimie Alexander as Lady Sif. But that's not all!

Marvel has released two headshots of the mysterious blue alien from Season 1 and promised a connection to tonight's episode. Could we learn the true identity of the creature?

Check out the photos here.

In case you missed it, here is the official description for the episode.

"'Who You Really Are'- 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, on Marvel's Agents of S.H.I.E.L.D., Tuesday, March 10 (9:00-10:00 p.m., ET) on the ABC Television Network.

Marvel's Agents of S.H.I.E.L.D. 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.

Guest starring are Adrianne Palicki as Bobbi Morse, Henry Simmons as Alphonso 'Mack' Mackenzie, Jaimie Alexander as Lady Sif, Eddie McClintock as Vin-Tak, Alexandra Manea as nurse, Lidia Porto as head nurse, Danny Lopes as Bruno, Ben Griesse as Tiago, Ruben Rabasa as Mr. Cardozo and Markell Andrew as officer Carvalho.

'Who You Really Are' was written by Drew Z. Greenberg and directed by Roxann Dawson."

What do you think of the photos? Let us know in the comments section.