Conversation so far:
who is the father of kate's baby on lost
Aaron, Kate's adopted son in Lost, was the son of Claire and her ex-boyfriend Thomas.
who delivered aaron from lost
In Lost, Kate delivered Aaron with the aid of Jin and Charlie.
who have aaron the nickname turnip head in lost
In Lost, Charlie gave Aaron the nickname Turnip head

Question: who plays kate
Self-contained rewrite: who plays kate in lost