When a rare phenomenon gives police officer John Sullivan the chance to speak to his father, 30 years in the past, he takes the opportunity to prevent his dad's tragic death. After his actions inadvertently give rise to a series of brutal murders he and his father must find a way to fix the consequences of altering time.

A boy who operates a ham radio and a man who works at a satellite relay station witness the same murder thousands of miles apart and have to figure out how to warn the next potential victim.

Night radio host Sam is in love with Emily. Afraid of showing his feelings he rejects her advances - to a point. Plagued by alcohol addiction and depression, he also has a less worldly problem: He (and the others) are vampires who are keen to hide this from the new station manager. All is explained in this black comedy.

A deep dive exploration of the science and creativity in the making of 'Frequency'