Why is Franklin so against Grace visiting Jonathan?

When Grace suggests that she might go and visit Jonathan in prison, Franklin’s response is pretty clear cut: “I wouldn’t go anywhere near that son of a bitch.”

Although it’s understandable that Franklin would be angry at Jonathan – after all, he did cheat on and lie to his daughter for months on end – it also feels like a response triggered by something more than anger.

I might be clutching at straws here, but I do think Franklin had something to do with the Alves family at some point – and his reluctance for Grace to visit his husband could come from a fear that Jonathan will either a) unveil the truth (because he knows about what’s been going on) or b) convince Grace he’s innocent, leaving her to dig deeper into what’s going on around her.

Why does Franklin know where the Alves’ apartment is? And what is he doing there?

After Franklin admits to Grace that he lent Jonathan the money, we see him stood outside Elena’s apartment, watching Fernando with what we now know is Jonathan’s baby girl.

The first big question here is how he knows where their apartment is in the first place. Elena was murdered in her art studio, so it’s not like he could work out Fernando’s location by simply visiting the scene of the crime. He also happens to know exactly what floor and window to look at, which is a very specific detail to know if he didn’t have anything to do with the couple.

The Undoing episode 3 recap: can anyone in this show be trusted?