I’ll be the first to acknowledge that Marvel’s Agents of SHIELD got off to a weak start. The chemistry was lacking and the plots pedestrian.
And I think they’ve got a way to go yet, but they have been building up steady momentum for a while now both in terms of the overall plot (who is the Clairvoyant?) and with guest stars.
The latest name to add to that guest star list is Amy Acker (Fred in Angel and Root in Person of Interest) who will appear in at least one episode this season as Agent Coulson’s previously mentioned ex… The Cellist as she seems to be referred to.
It might be worth keeping an eye out also for a Guardians of the Galaxy tie in, because that blue alien doesn’t exist in a vacuum in the Marvel universe. Apparently, as many suspected, it was a Kree.