Hmm, Wendy makes a good point, about Lois going off on an investigation after realizing Clark is missing. I think we were all -- well, at least I was; I shouldn't speak for everyone -- assuming that the email was related to Clark's disappearance, but Wendy is right when she says that there is no evidence to that fact yet. Maybe you could add in something in the next section that has her hoping that it was related -- was it a coincidence that she gets this tip just as Clark/Superman disappears?
One thing I noticed also in this part is that Lois was talking to Martha about *Clark* being missing when Jimmy was standing right there. Did Jimmy make the connection? I'd think he would at least ask about it. And people will start wondering about Clark by morning, since he has now lost an entire day at work. So I think Lois needs to figure out what she's going to say about Clark, especially since she now suspects whoever it was who took him did so in Clark's apartment -- and while we now know that Clark was still in the suit when he was abducted, Lois doesn't. For all she knows, someone was out for revenge against Clark and just brought some K along as insurance.
As for the drugs, I think she needs to either take some samples or take some photos to help her do more research later. Of course, that assumes she's not about to be abducted herself.
And Clark ... my poor Clark! Not much new for him, other than he knows that they either know CK=S or knew that he'd be in Clark's apartment and that he thinks the woman sounds vaguely familiar. He needs to keep trying to place the voice (should be easier once they come back to torment-- I mean talk to him

). I, too, think he needs to keep trying to reach Lois, but if he needs motivation, the worry that these people might know his secret should provide it. If they know CK=S, and they know Clark and Lois are engaged, then Lois would be an easy and obvious target for revenge against him.
OK, not as many suggestions this time as observations and thoughts. Hope there was at least something helpful in here.
Kathy