CREATE TABLE table_3996 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

What is the original air date the was written by mark st. germain and direct by jay sandrich?
SELECT "Original air date" FROM table_3996 WHERE "Written by" = 'Mark St. Germain' AND "Directed by" = 'Jay Sandrich'
SELECT "Original air date" FROM "table_3996" WHERE "Directed by" = 'Jay Sandrich' AND "Written by" = 'Mark St. Germain'