Table: csi_ny_characters_3
Columns: character
portrayed_by
crime
first_appearance
last_appearance

Question: What is the name of the first appearance when Chad Williams is a portrayal?
SQL: SELECT "first_appearance" FROM csi_ny_characters_3 WHERE "portrayed_by" = 'chad williams'

Question: Which character is portrayed by Elias Koteas?
SQL: SELECT "character" FROM csi_ny_characters_3 WHERE "portrayed_by" = 'elias koteas'