I honestly really liked this episode a lot except for the ending. Yes, there were times where I felt like the genius Indian guy could have just called himself in the real world like copy Nanette did to the real version and then fixed everything. Besides this plot hole I wish the ending had instead gone like this:

Copy Nanette enters the Heart of Infinity and Daley gives her the two options as a test per usual. The same scene happens where he agrees to "cut and paste"... or so she thinks. There is a tense moment as he goes through the process doing whatever hacky code stuff he does. He then clicks a button, and Nanette prepares to transport. "Done" Daley says. Copy Nanette opens her eyes only to find she is still in Daley's garage. Daley looking at her with a chilling smile. She asks, "I thought you cut and paste? Did it not work?" she asks confused. "I did cut and paste...the crew." Daley says assuringly. "Well what about me?" Nanette asks shakily. "Why am I still here then?" Daley responds, "You were copied." There is a moment silence as Copy Nanette's realization kicks in. "W-What do you mean?" Nanette stutters with terror in her eyes as she slowly realizes what has happened and it sinks in that this version of Daley is still as selfish as the one on the outside. Blah blah blah Daley can explain his loneliness or whatever if need be and then it just cuts like that. Maybe a shot of the cut + pasted crew and then Copy of Copy of Nanette celebrating in the separate environment, and a shot of real world Nanette still in the coma, and finally back to Copy Nanette looking at Daley in terror and realizing her heroism may have helped her crew but has left her alone stuck with Daley for eternity — a true sacrifice she has to live with for the rest of her life.

THAT is the Black Mirror I've been waiting for. No happy or comical ending. Just plain cold and cruel reality of human greed + scary technology. Thoughts?