If your talking about The Crazy Ones...that show was canceled..which I'm sure had some sort of impact on his depression, as someone who is still fighting that fight I know that almost anything can make it better or worse. Will Wheaton wrote up a nice bit about depression a while back and linked to it the other day http://wilwheaton.net/2012/09/depression-lies/
It is not like he was alone - the devious thing about depression is that it's very different from what we "normals" feel as sadness, where other people can help us cheer up.The fact that he didn't have anyone to help him find the bright spots in life at the end is a cruel irony.
Of course, it's personal/subjective, and it might not be what ever person that suffers from depression experiences is.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.