It’s state-by-state in the US. Some states allow it if just one person wants to record a call. The others require both/all people to know and approve. The fun part is when somebody in a one-party state calls somebody in a two-party state…

https://en.m.wikipedia.org/wiki/Mission:_Impossible_(1966_TV_series)

I’m a huge fan of the original Mission Impossible TV series from the 60’s and 70’s. I’ve watched the entire series a few times now. I can’t stand what Cruise did to the franchise, especially since he basically plays the same thrill seeking character in all his recent movies.