Of all the characters on Alphas, the one who gets the most complaints is Gary (from what I've read online). They don't like his mannerisms, his occasional disregard for instructional, and think he's annoying. While these people are hardly a large part of the audience, it seemed very relevant since "Rosetta" has lots of Gary.
I would agree that Gary is unlike the other characters. He's more difficult than the other characters and can be annoying at times, but that is an essential part of the character--his behaviorisms that come with his condition. What his autism also brings is a sense of innocence and charm when he does his job. In "Rosetta," realizing that Anna is in charge of the Red Flag cell, Gary is broken from this. Both he and Rosen realize that Anna's message may have some credence, but that her methods are wrong. Indeed, Gary asserts himself at the end of the episode and we realize that Gary was helped, in part, by Anna, a potential killer.
Score: 8.7/10
