I had a Google Plus circle with one person in it. I understand that an outsider can see on my profile who is in the circle, but can this outsider see emails, chats, hangouts, etc. too?
but can this outsider see emails, chats, hangouts, etc. too?
No, they can see only your public posts
And while they might be able to see you have a person Circled, they can't see what Circle you put them in.– aleOct 9, 2014 at 20:54