Question: What is the original air date the was written by mark st. germain and direct by jay sandrich?
Schema: create table table_2818164_7 (original_air_date varchar, written_by varchar, directed_by varchar, PRIMARY KEY (original_air_date))
SQL: select original_air_date from table_2818164_7 where written_by = "mark st. germain" and directed_by = "jay sandrich"