The title of this episode, Adapt or Die, refers to one of my favorite themes in comics.
Change or die is the through-line of such classic graphic novels asWatchmenandThe Sandman.
He doesnt even realize that his S.H.I.E.L.D.

Jessica Brooks/ABC
base is slowly being taken over by Chronicoms, who are stealing his agents faces and memories.
Stoner loves all their fancy technology (such as the tracking machine that allows 70s S.H.I.E.L.D.
to pursue the high-tech Zephyr) but doesnt think about where it comes from or what it might cost.
Meanwhile, Sousa and Daisy find themselves in the captivity of Daniel Whitehall and young Gideon Malick.
Sousa is able to get Daisy back to the Zephyr, and they both seem okay.
On the Zephyr, Coulson and May have a conversation.
May says that shes grown accustomed to his many returns: You never die.
You always come back.
They have a very abstract, sci-fi conversation in a white room about mortality and time.
Their sacrifices mean something, and he promptly proves that by blowing up the Chronicoms timeship with him aboard.
May isnt too worried when she hears: Hell come back.
The most brutal stuff in this episode, though, is saved for last.
But as they approach the Zephyr, May realizes shes not picking up any emotions from them either.
Sure enough, its soon revealed that Macks parents have been drained and replaced by Chronicoms.
Its hard to blame Mack for taking a motorcycle ride shortly after they land, to get some air.
Deke follows, since he knows what its like to lose his parents.
Hoping that means we might see Fitz again soon.
Simmons isnt nearly as fun a character without him to interact with.