CREATE TABLE table_73259 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT, "U.S. viewers  ( millions ) " TEXT)

what is the No in series when Rob wright & Debra j. Fisher & Erica Messer were the writers?
SELECT MIN("No. in series") FROM table_73259 WHERE "Written by" = 'Rob Wright & Debra J. Fisher & Erica Messer'
SELECT MIN("No. in series") FROM "table_73259" WHERE "Written by" = 'Rob Wright & Debra J. Fisher & Erica Messer'