One of the things I've noticed is that "Marvel's Agents Of S.H.I.E.L.D." is very careful to just show scenes in their "previously on" montage that directly relate to the episode ahead. It makes sense we'd see a little bit of what happened last week to Skye and Coulson and the rest of the team, but I was surprised to see them include a moment of May and Ward discussing their surreptitious sex life.
The show is feeling more and more serialized each week. We pick up immediately after the end of last week's episode, with Lorelei (Elena Satine) still traveling with the groom she stole from his own honeymoon. She finds a motorcycle gang that better suits her ambitions, and she tosses away the first guy like a dirty tissue. She's obviously looking to assemble an army of men under her own control, and because of her powers, it makes perfect story sense for Sif (Jaime Alexander) to be the one who has to go after her.