Debbie,
I never consider a Tempus threat to be a cliff hanger. He always over thinks things leaving an escape route no matter how hard he tries.
Outside his personal incompetence in the evil doing realm, he seems to have forgotten about Jordy and Laura as far as Utopia goes, but then Tempus always seems to forget something... As far as his threat goes the only thing I can think of is that he has left some Kryptonite somewhere in the dimension Kara is stranded in since there was no Krypton explosion and spaceship to Earth for the rocks to follow so hence no Kryptonite in this dimension. Don't know of anything else that can kill Superman unless you let Deadly Chakram near him

.
I realize we seem to need Tempus to make the L&C world go round but why doesn't someone like Herb just shoot the SOB and put him out of his misery. I loved the part in the story "And Back Again" by CC Aiken where alt-Lois who is called Lane in the story to keep it straight between between her and non-alt Lois shoots and kills Tempus when he attempts to kill all four of them. I understand the desire to keep him around to make the time-traveling stories more interesting but really...
I can't wait to see Kara's next encounter with Kevin, particularly if she has Mom and Dad in tow.
Mike