Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_73965 ( "No." real, "#" real, "Title" text, "Directed by" text, "Written by" text, "Patient Portrayer" text, "Original air date" text, "Production code" text )

### Question ###
What is the production code for the episode where the patient portrayer is Kathy Lamkin?

### Accurate SQL ###

SELECT "Production code" FROM table_73965 WHERE "Patient Portrayer" = 'Kathy Lamkin'