they didn't. no one knows this better than stan's wife, birgit. >> i fell in love with him, so it was like, oh, my god. this beautiful person, but i always felt like i was holding back something. i just couldn't get to it. he could transform into this genius, awesome, glowing person, and he is that, part of him is that, too. but then he's got that shadow. i guess some people get more sad than others. >> how bad is his depression? >> sometimes he will just lay in bed like he doesn't want to get up. or he will not go to sleep, and it creates friction and arguments, and you just can't really talk to him. >> when he's in the grip of depression, stan feels the need to isolate. even as his family gathers, he pulls away, cutting himself off from those he loves. >> how does that make you feel, that he can't have dinner with you and the girls?