If you read my review of last night’s episode of “Marvel’s Agents of S.H.I.E.L.D.,” you not only know that the series has finally hit its groove, and some of the mysteries running through the show have begun to break. You also know that a couple of our writers here at Biff Bam Pop! have a steak dinner bet going about what that blue alien really is. What do you think? We’ll explore a few of the theories after the jump.