At least there were some clues about Walt that Hank missed. At this point, there's nothing that Stan knows or has seen that would/should in any way lead him to think P or E are Soviet spies.

That w as my first thought, too.

I'm bracing myself for the blowback, but — is it just me, or does anyone else not buy Mary Steenburgen in the Katherine Hale role? I just don't find her as a convincing actress in that part.