Could a strange silver object seen in the sky seen over Kansas be a real UFO? Is a sound permeating through the ocean a warning that something bigger lies below? And what accounts for a strange purple beam caught on camera in Alaska? Tony Harris and his team examine the evidence and look for proof that these unusual occurrences aren't exactly as they seem.

Could a bipedal figure crossing a snowy field be the fabled yeti? Is a color-changing orb in the sky another example in a long history of UFOs in Italy? And is a creature peeking around the corner a real life alien encounter? Tony Harris and his team examine the evidence and reveal which of these sightings are truly unexplained.