Mack even got to slip in one last robot reference near the end…
Fitz: "Aida was his life's work; she was kind of, like a child."
Mack: "Small Wonder"

Kara's call was to her mother, thanking her for the picture she sent. Kara needed a picture of herself so that her nanomask could replicate her real face (without the burn damage). I thought it was interesting that Deathlok asked if she had any "spare masks lying around" after scanning her.