CREATE TABLE table_2194 ("Episode" TEXT, "First broadcast" TEXT, "Rufus guest" TEXT, "Marcus guest" TEXT, "Winner" TEXT)

When is the first broadcast for episodes where Rufus's guest is Jack Whitehall?
SELECT "First broadcast" FROM table_2194 WHERE "Rufus guest" = 'Jack Whitehall'
SELECT "First broadcast" FROM "table_2194" WHERE "Rufus guest" = 'Jack Whitehall'