1) “Dopesick,” any time, Hulu. As the sixth (of eight) episode begins, coal country has been shattered by OxyContin. An earnest doctor (Michael Keaton) has lost his license and is in rehab; his young patient (Kaitlyn Dever) is deeply addicted. Some federal officials in Virginia face resistance from the Purdue Pharma drug company and indifference from Department of Justice leaders. It’s s stunning episode, including great work from Keaton, Dever and (as an intense drug official, shown here) Rosario Dawson.
2) “CSI: Vegas,” 10 p.m., CBS. This “CSI” reboot began with a crisis: Someone framed former lab tech Hodges; that could invalidate thousands of convictions. Now Grissom and Sidle have a suspect, in an intriguing story that will reach a turning point next week. As usual, there’s also a quicker case to solve: All of the people on a flight have been brutally killed … yet someone managed to escape with a fortune. Folsom (Matt Lauria) solves it, and even has a few warm moments.
3) “The Masked Singer,” 8 p.m., Fox. The World Series ended one day early, when the Atlanta Braves — with only baseball’s 12th-best record during the regular season — beat the Astros, four games to two. So “Masked Singer” is back, with a Thanksgiving theme and Group B performing; Joel McHale is a guest judge. “Alter Ego” follows at 9 p.m.
4) “The Conners,” 9 p.m., ABC. After floundering through much of her life, Becky is suddenly thriving in college. Her nephew Mark, however, is at a new school. His mom (Darlene) worries about him making friends; he turns to Ben for advice.
5) “Secrets of the Dead,” 10 p.m., PBS. This was a 10-year probe of a mystery that goes back 5,000 years: Yes, the Stonehenge monument is fascinating, but it offfers a separate mystery: The stones in the inner circle were apparently transported from a Welsh field, 130 miles away. A college prof struggles for years to prove that a structure was first built in Wales, then massively relocated.