Gay Heroes character disappears.

Considering Heroes is a show about people embracing what's special about themselves, it would have been great for gay teens see themselves reflected on TV by Zach. It's unfortunate and really – we only took one line out of the script. In really, in all of our minds, the character was still gay but we couldn't say it explicitly. I was very upset by it – I was not happy about it at all. There were times I had to avoid talking about it because we didn't want to have a negative reflection on the show. The show's been such a positive experience for so many people, we didn't want to get hung up on the fact that one actor's management felt that it was a career killer for him to play a homosexual which, as a gay man, I found incredibly insulting. We had episodes planned for him to be in, and she pulled him from the show altogether. So that's why he sort of disappeared.
Source