Episode 01 - The Man Trap

From IMDB:

Dr. McCoy discovers his old flame is not what she seems after crew members begin dying from a sudden lack of salt in their bodies.

An interesting episode, but hard to believe. A creature kills your wife and takes her appearance but you are OK with this? And you continue to help it survive? Also, perhaps with people dying it's best not to just send poor helpless crewmen out on their own to fend for themselves...

Death Toll
Security Officer Darnell - blue Shirt
Crewman Sturgeon - blue shirt
Crewman Green - yellow/green shirt
Crewman -
Professor Robert Crater - civilian
salt-sucking creature

Current Overall Tally
Red Shirts - 0
Enterprise Personnel - 4
Civilians - 1
Aliens/Creatures/Other - 1