These two episodes have been pretty useless. As a character study it is somewhat interesting, but it was just 2 hours of watching The Governor turn into the character he was to begin with. He could have shown back up without them and the net effect on the overall story would be zero.
I find it funny that a few WD fans thought the Governor was somehow humanized by this new family--specifically Penny 2.0. He's a mass murderer ... and how many times do we need to see ... that he is truly evil?
He's not Merle (11th hour change of heart). He's just a mass murderer, and all of the surrogate family fantasies in the world cannot change that.
We were supposed to think it was an arc where he was humanized again, and then fell again. Actually he was the same character the whole time. Martinez thought he had changed too, but he hadn't. Martinez didn't know him well enough.
Unlike Martinez, we were given some insight into what drives him. He's a twisted, disturbed, mass-murdering individual all right, but he's also more than just a mustache-twirling villain.
Basically: when he "cares about" someone, it brings out some sort of paternal/protective behavior to a totally obsessive degree. It's like throwing a switch. He becomes capable of doing
anything in order to take care of that person. He has no remorse for his actions and he knows they're wrong, but he justifies his actions because of this protective monomania. Whether he can feel actual love is open for debate, but even if he does, he probably thinks he owns that person. (Maybe not just people, either... you could make the argument for the whole Woodbury community, too.) Fortunately, he has a massive amount of charm he can call on to cover up his inconsistencies.
That's why he suddenly stuffed his surrogate family in the car and ran ... the camp was not safe enough. He finally decided the best option to protect them was to kill Pete and take over the camp.
It's also exactly how he behaved with Zombie Penny. Obsessive love mixed with massive denial and probably some delusions of grandeur too.
You take away whatever he's protecting, and he loses any semblance of rationality, which is what happened at the end of last season.
And in his "off" moments, he's REALLY off. Again, it's like turning off a switch. He becomes just short of catatonic. Obviously we saw it in the last episode, but that's also how he behaved when he was sitting in front of his walker aquarium.
Because Martinez knew him from the old days and was starting to bring it up too much in front of The Governor's new family. Obviously the Governor doesn't want his new family to know about his past.
Why did the scorpion sting the frog?
No, he had made the decision that Martinez was the wrong person to lead the camp (thereby putting his surrogate family at risk). That's why he was murmuring objections while he was killing Martinez. Either he couldn't accept Martinez as leader or he couldn't accept sharing leadership, which was what Martinez had just offered.