If you're an Amazon Prime Member, you can enjoy a FREE Trial of Showtime, HBO and Starz for a limited time. There is no coupon code required to get this deal. The FREE Showtime Trial is for 7 days. The FREE HBO Trial is for 7 days and the FREE Starz Trial is for 7 days. You must be an Amazon Prime Member to get this deal. If you decide you do not want to keep the service after the free trial, you must cancel the subscription before the 7th day to avoid being charged the monthly fee.