CREATE TABLE table_73965 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Patient Portrayer" TEXT, "Original air date" TEXT, "Production code" TEXT)

What is the production code for the episode where the patient portrayer is Kathy Lamkin?
SELECT "Production code" FROM table_73965 WHERE "Patient Portrayer" = 'Kathy Lamkin'
SELECT "Production code" FROM "table_73965" WHERE "Patient Portrayer" = 'Kathy Lamkin'