If you have ever even so much as heard of Lifetime existing, then you know every single beat of Unforgettable from beginning to end. What it does, it does quite well (and further proves the point I made about Katherine Heigl finding her place in sociopathy when I wrote my Home Sweet Hell review), but it doesn't have a single new thing on offer.
Final rating:★★ - Had some things that appeal to me, but a poor finished product.