“Thunder Force” (PG-13), “Concrete Cowboy” (R), “Voyagers” (PG-13)
Melissa McCarthy and Octavia Spencer are forces of nature. It’s their personal appeal that propels “Thunder Force,” a silly superhero spoof written and directed by McCarthy’s husband, Ben Falcone. McCarthy and Spencer play two friends who become a dynamic duo when Spencer develops a method to imbue them with superpowers....