“Scorched Earth” (*1/2 out of four) was a slipshod action thriller set in yet another post-apocalyptic Earth that look like leftover sets from “Mad Max” and “28 Days Later” starring Gina Carano in her umpteenth role as a bounty hunter tracking down criminals who are attempting to destroy civilization. Little to recommend it, even for fans of Carano or MMA. John Hannah does what he can in a minor supporting role as Carano’s friend but he deserves far better than this dreck.