The Rangers run up against several alien criminals they've faced before, and all of whom are still captured! Sky, upset about not being given the new Battlizer Kat and Boom have developed for Jack, is sent to interrogate an imprisoned alien named Mirloc. He learns the source of the copycat criminals is a creature called Slate, able to change into others at will. But the information comes at a high cost for Sky, who has to relieve the sad fate of his father. (thetvdb.com)