“The Signal” is a brain-bleeder with surprising accessibility. This is a tricky review to write, as much of the film’s power comes from its secrets and reveals, with a deliberate leisurely pace to help accentuate moments of paranoia and an overall sense of psychological disturbance. Co-writer/director William Eubank conjures elements of “The Twilight Zone” and superhero cinema to help shape this odd but striking effort, and while the young helmer doesn’t have the tightest command of pace, Eubank makes up for occasional cinematic stasis with a convincingly mysterious viewing experience that successfully sustains interest all the way to the final frame. Read the rest at Blu-ray.com