CREATE TABLE table_23410 ("No. overall" TEXT, "No. in series" FLOAT, "Family/families" TEXT, "Location ( s ) " TEXT, "Original air date" TEXT)

Name the number in series for in the ward family and the wren family
SELECT MAX("No. in series") FROM table_23410 WHERE "Family/families" = 'The Ward Family and The Wren Family'
SELECT MAX("No. in series") FROM "table_23410" WHERE "Family/families" = 'The Ward Family and The Wren Family'