Hi guys, weird question, but I need your help ;)

If you live in US: what time is it now where you live, and at what time will the show be aired?

I ask, because I'm planing to watch the live stream of the episode tonight, however I live in Poland and I'm having trouble figuring out at what local time the show starts, because I don't know what "10/9c" means and I want to be prepared for the airing ;)

Thanks in advance!