Couldn't Watch Game of Thrones Season 7 Dragonstone

Even though Comcast had a week long free HBO promotion that went through July 16th, the new episode of Game of Thrones couldn't be watched. It said on the TV, watch now for free, but wouldn't play at all.

I questioned it on the Xfinity forum support, but of course, got no reply. I don't want to pay for HBO, I'm paying for enough unwanted things from Comcast and my bill just gets higher.

Anyway, now I would just want to view that one episode that aired yesterday online, for free, and legally. Thought I'd ask the folks here about it, since you all are very knowledgeable about such things.

Any website that the complete episode 1 of season 7 can be viewed on today without making an account, joining anything or paying for it?

Thanks for any advice or links.

Thanks, I'd only want to do it legally.