#agent brooks

because the thing is, ctrl-alt-del clearly set everything up to bring Control in on the AI fight. at least she knows Samaritan can't be trusted, and has good reason to suspect it/Greer from making their own plays (i say Greer because i see Control as the sort of person who'll focus more on the human "mastermind" behind the machine, even if that's not how it works). and if Control is going to be a player in all this, and one working under so much survaillance from Samaritan, then that double agent might make or break whatever play she'll eventually be involved in. so then, that would means this 

if this is the case, then i'd speculate some more: the reason we don't know who it is, that we weren't somehow introduced to someone new, is because it's someone old. we've got two old someones there, guns ablazing to rescue Control: Grice and Brooks. so you can probably guess were im going with this. 

Grice has clearly stated he doesn't trust Samaritan, even tho he might not know of Samaritan's existance or how it works. We're reminded of this again in ctrl-alt-del, he doesn't like not doing his own research and just killing their marks. Brooks on the other hand, trusts Research implicitely, and mostly just humors him as one would do with any partner: overlook the annoying traits and get the job done. but what if this blind trust in Research is actually just a blind trust in Samaritan?