I know most people hated BB16 (I thought it was alright personally and I loved the cast).. Probably no one wants to think back to it

but I was wondering something:
I didn't watch feeds for BB16 so for that double eviction where Zach was almost going to get evicted but was saved, how were the feeds leading up to it? and after the double eviction? Was Jocasta legit blindsided and what were Zach's reactions other than what was on the show?
Zach looked PUMPED UP, full of energy, and I'm sure they told him everything that was going down that week, at some point, but did it actually get shown on feeds? Like who told him he was almost evicted / how did it go down / what was his reaction / etc.
Anyone remember? Or was it just a case where it all happened on eviction day when feeds were off?