The last time out, we did mention that Lady Sif would be returning to Marvel Agents of S.H.I.E.L.D. with some twists. Lady Sif returns with a disability, losing part of her memory after battling a mysterious warrior.

However, it is believed that the team would be in for a surprise once they learn of why Lady Sif has returned. And it could all turn out to be about the Blue alien race that she had mentioned before to Coulson which would turn out to be the true race where Skye and Raina are tied up with.

Indirectly, the revelation of the blue Inhumans could be in preparation of a movie that is set to be shown in 2019.

In the next episode, the origins of the Kree (or the alien Blue race) may be divulged. Lady Sif will reportedly shed off some light on the true origins of the Kree. And for Marvel readers, Ronan the Accuser from the Guardians of the Galaxy could eventually come into mind.

Headshots put up over at the Marvel website all the more places more emphasis that the Kree would be eventually introduced in the next episode. But aside from the said blue race, it seems that there is another revelation in store of show followers.

There is reportedly another double agent within the ranks of the team and your guess is as good as ours on who it could be. Who could be another double agent after Ward?

Much of these and more should be revealed in the episode "Who You Really Are" so don't miss it!