This episode was sad on so many levels. To begin with, Max and Logan make contact with one another which puts Logan into the hospital. It's finally realized that a transfusion of transgenic blood (other than Max's, of course) will likely help him fight the virus. So, Logan receives some of Joshua's blood in order to save his life. Unfortunately, the whole experience shakes Max up so much that she drastically decides to cut Logan out of her life completely; she doesn't want to risk his life again. Logan is heartbroken; he knows that being without her is worse than the complications of being with her. But, Max is determined. In the end, she lets him believe that she's moved on with Alec, telling him that it's over-- get used to it.
Secondly, there's Joshua. Joshua meets a new friend, who's blind, thus enabling him to safely enjoy her company. She has no idea that he's a transgenic. Her sweet spirit charms Joshua immediately, and he quickly begins falling for her. Unfortunately for Joshua, he is convinced by Alec to end things with her now before he puts her life at risk.
Thirdly, there's Alec. Alec gets arrested for the murders that his Manticore clone, Ben, committed, which forces Max to deal with the pain surrounding her last encounter with Ben. She finally tells Alec what happened the year before when Ben snapped and went on a killing spree and how she killed him at his request. Alec understands now some of the difficulty she's had with him and finally begins to soften where Max is concerned.
Lastly, there's the general transgenic tension, which is this show's way of dealing with "racial" issues. Only it's not races that we know, it's transgenics. "Everyone's afraid of what they don't understand" is the line being repeated by Max and Joshua. In this episode, those fears come to a tragic head as the diabolical White sacrifices the life a mutant transgenic in a way that also exposes their existence to the world. The incident sends Max, Alec, and Joshua scurrying to protect themselves.
With tension building, the climax isn't far off...