Free Movie at Blockbuster ExpressToday only (Oct. 31) you can get a free one-night DVD rental at your local Blockbuster Express when you use the coupon code HALLOWEEN at checkout. This is only valid on Halloween. Be sure to return your DVD the next night by 9 p.m. to avoid late charges. I also recommend reserving your movie online with the promo code, to make sure it will be there when you arrive.