TV HIGHLIGHTS Mysteries Decoded, 8 PMon Ch. 26: Insane Pools: Offthe Deep End, 9PMon DIY; 12AM on DIY:

PGATourGolf, 3PMon GOLF; 8PMon GOLF; 12 AMon GOLF: Olympia

Field Country Club south of Chicago is the scene today through Sunday as the PGATour’s best tee is up in the BMWChampionship. Justin Thomaswon this tournament a year ago when itwas played at nearby Medinah Country Club. He let a six-shot lead dwindle to two in the final round before regaining control to win by three strokes over Patrick Cantlay. He’ll return today to defend his title.

U.S. Navy veteran turned private investigator Jennifer Marshall heads toWest Virginia with authorMJ Banias (“The UFO People: A Curious Culture”) to examine the lore of the Mothman, amysterious winged creature whose occasional appearances are regarded by locals as harbingers of imminent disaster. Themost familiar example of this was a horrifying 1967 bridge collapse near the community of Point Pleasant. Itwas the deadliest such accident in American history— and recently there have been reports that theMothman may be back.

Pool contractor Lucas Congdon finds himself confronted by a number of thorny and decidedly unexpected challenges on a job as he works around frustratingly rocky terrain, along with the oncoming threat of swiftly approaching winter in the newepisode“Best in the West.” Some truly eyepopping mountain country serves as the perfect setting for these killer pools he’s installing, as long as he and his team manage to finish in time.