CREATE TABLE table_16124 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Director" TEXT, "Writer" TEXT, "US air date" TEXT, "Storyteller" TEXT, "Villains" TEXT)

How many have Mrs. briar as a villain
SELECT COUNT("No.") FROM table_16124 WHERE "Villains" = 'Mrs. Briar'
SELECT COUNT("No.") FROM "table_16124" WHERE "Villains" = 'Mrs. Briar'