some hints on Olive... we didn't see her in the amber but we did see Belly. Walter was furious at Belly, so much so that he cut off his hand instead of getting him out of the amber. Henrietta was wearing a damaged bullet on her necklace. Peter didn't mention her when he realized who Etta was. I'm not gonna say what my guess is.
Fav line was Walter quoting Star Wars. I practically fell off the couch laughing when he delivered it so seriously. John Noble is amazing!