On October 31st, come in in your costume and get one FREE boo-tiful doughnut of your choice (including the Ghostbusters doughnuts) at any participating Krispy Kreme US and Canadian location.Offer good on October 31st only. No purchase necessary. While supplies last. One doughnut per customer. Good on October 31st only. Offer not valid at Albany, Ga, Pigeon Forge, TN, Panama City, FL, Dothan, AL, and Uncasville (Mohegan Sun) locations.