Hmm, I don't know about the letter bit. I mean, I automatically assumed the second letter was to Martha and Jonathon, but wouldn't it get sent to the farm? Why would Superman give Murray instructions to find the Kents at Clark's apartment? I figured we wouldn't hear about that letter again until the Kents went home.
Also, I wanted to throw in that I liked Cat's appearance in this section. I was surprised that she'd basically admit her jealousy towards Lois (or at least her ability to attract guys), but it's cool that we get to see her perspective on Lois' career. Kind of a "what could have been" for Cat's own career.
Also, I like how Jimmy helps save the day when Lois is trapped with Trevino. He doesn't get to play hero often, and he definitely rose to the occasion!
