CREATE TABLE table_23833 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( in millions ) " TEXT)

Name the series number for m. scott veach & rebecca kirsch
SELECT "Series #" FROM table_23833 WHERE "Written by" = 'M. Scott Veach & Rebecca Kirsch'
SELECT "Series #" FROM "table_23833" WHERE "Written by" = 'M. Scott Veach & Rebecca Kirsch'