“Catalyst” shows how NASCAR mechanics are creating engine parts using a 3D printer.
Join violinist Scott Yoo for "Great Performances: Now Hear This," on Fridays at 8 p.m. The 4-part miniseries merges music, storytelling, travel and culture, as he chases the secret histories of some of the greatest music ever written.
Ex-FBI profiler Inger Johanne Vik is drawn into investigating a series of brutal murders in Stockholm after her daughter becomes an unwitting witness to a murder.
A third season of cold case investigations and emotional roller coasters in "Unforgotten" airs Saturdays at 9 p.m., beginning Sept. 14 on Arizona PBS.