Redbox: FREE One Night RentalFebruary 5, 2011 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. Redbox is offering a FREE one night rental, with an unknown expiration date! Just enter code QM4KTX6 to get yours. Don’t forget…it’s only FREE if you remember to return it by 9pm the next night!Thanks, Hip2Save!