In Episode 7 of The Secret of Skinwalker Ranch, a suspicious helicopter is spotted flying over the ranch. Despite having binoculars they failed to identify it, and said it did not show up on the ADS-B scanner.
[Update] I contacted Corporate Helicopters. Ivor Shier, the director of operations, called me back and confirmed it was their helicopter and that they were just doing a LIDAR powerline survey. This is looking for things like defects in insulators and encroaching vegetation - anything that might be a fire hazard. He said that's all it was. He said they don't turn off the ADS-B, but that area has very poor receiver coverage. They don't rely on only FlightRadar24 style ADS-B, but also have TracPlus monitored from the head office, and also by the powerline company. He sent me some photos:
[Previous investigation follows]
After a bit of poking around, I think it's this one:
N545SA, a Bell 206L3
Dates in the show are unclear as they falsify the on-screen dates to provide a narrative timeline (this episode starts with a label August 16,2019). But we know for sure from some dates shown in monitors that some of it was filmed in August 2019. Around that time 5SA was flying out of Provo, Utah, about 100 miles from Skinwalker Ranch.
I downloaded the available tracks, but coverage seems a bit limited. But there were several partial tracks.
The Helicopter was heading towards the ranch at 15:54 UTC Aug 22 2019, which in Utah time is 9:54 AM. It's 67 miles away
At 19:47 UTC (11:47 AM) it shows up again 43 miles to the East, almost directly on the other side
So presumably would have flown over the ranch at some point.
What was it doing? What is it flying over.
Power Lines.
And those power lines run just a mile north of the ranch, so the helicopter, surveying powerlines, would have flown right over the mesa.
The helicopter is owned by Corporate Helicopters, who lease it out to power companies
https://www.corporatehelicopters.com/helicopter-services/helicopter-utility/aerial-mapping/
In the show at 06:10 there's a better shot of the helicopter.
Comparing the number to a blurred version of the chopper, we can see it's A) there, and B) consistent with being the same number N545SA
And here's another shot, maybe better;
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