Very interesting story because at the beginning you think it's going to be about the visiting scientist and his experiment but it turns out to be more of a Wesley story. Good conflict between the nanites and the scientist; intriguing use of the prime directive to protect the nanites even thought they were threatening the Enterprise. Other things we liked:
- Data's cool "nanite" voice.
- Whoopi episode!
- Glimpse of Wesley's girlfriend...whoo-hoo! (And she even looks human, not an alien.)
Flaw: isn't anyone gonna punish Wesley for nearly destroying the Enterprise?