The investigation has been going on for months, and we're still 'none the wiser' about the true cause of the accident. [=we still don't know anything more about the true cause]
I'm 'wise to' you. = I'm 'wise to' what you're doing. [=I know what you're doing; I know that you are trying to do something dishonest]
I borrowed his car and returned it, and he was 'none the wiser'. [=he did not know that I had borrowed his car]
(..) your people from being even more so. Well, I did reopen the fighting pits. Under my rule, murder will once again become entertainment. Yes, that was wise. And you agreed to marry someone you loathe for the greater good. Very impressive. though not by choice and certainly not (..)2015 TvShow: Game of Thrones Title: Hardhome Season: 5 Episode 8