The Secret of Skinwalker Ranch

Former Utah governor Gary Herbert joins the team's efforts to solve a puzzling mile-high airborne anomaly that could point to stranger goings-on.

Searching for answers, the team shows its footage of a cow's sudden death under a mysterious object to the original witnesses of an infamous UAP video.

The team strives to uncover information that could answer this question: is there something hidden underground causing or controlling the UAPs?

Astronomy experts provide their know-how for experiments that could reveal whether something above the mesa is obstructing the team's measurements.

The team investigates a possible connection between its recent experiments and a cow's bizarre behavior. A retired colonel makes a bold claim.

A former military officer who worked security on the ranch offers unsettling testimony. Travis and Erik check out signal interference at a radio station.

When a drill team arrives to investigate potential caverns beneath the mesa, efforts hit an unexpected — and unsettling — roadblock.

Details of Tom's strange experience deepen the mystery surrounding the metal fragments found during the dig beneath the mesa.

Travis and the team conduct a complex experiment using rockets and lasers in hopes of making contact with the anomaly in the mile-high zone.

With the creation of a 3D map of the ranch comes a new perspective on recent happenings — and revelations that challenge the team's view of reality.

Looking back on the past three years, Travis recounts the team's experiences of aerial phenomena, underground discoveries and dangerous incidents.