This deal has ended.
Use this link to join for free when you buy an online plan at Weight Watchers Online. Usually, you're charged a $29.95 sign up fee plus an $18.95 monthly fee, bringing your total to $48.90. Right now, you'll only have to pay $18.95 for the first month. Your subscription is automatically renewed at that monthly rate ($18.95) until you cancel. See here for more details.