“The Mutation” (* out of four) was a horrendous horror potboiler about various citizens (Megan Purvis, Sarah T. Cohen, Abi Casson Thompson, and others) of a metropolitan city who become up in arms by a mutated rat (or actually an actor in a bad rat costume) that is wreaking havoc. If you ever wanted to see what an Ed Wood horror movie might look like in contemporary times, look no further; anyone looking for entertainment value or scares should look elsewhere. Laughably bad costumes is matched by dumb dialogue and by-the-numbers plotting.