I just watched "The Ulimate Computer" from season 2 and thought that might be an intriguing idea to revisit since computers were still pretty new in the 60s and now computers pretty much are life. I really like the character of Dr. Downstrom (sp? I'm really tired) and think that could make for an interesting villian. Since they mention he won a Nobel prize at 24 but then could never re-capture that glory, it'd be intriguing to me to see in this timeline, the crew of the Enterprise meeting him at his much younger age.