Worth watching

8 p.m. (TNT) Cold Justice

In 1998 in Indiana’s Vigo County — home of Terre Haute — 19-year-old Erika Case was stabbed to death while house-sitting for a family friend. Nobody was arrested for the crime, but that could change when former prosecutor Kelly Siegler and former crime scene investigator Yolanda McClary look at the facts with fresh eyes in the new episode “He Said, She Said (Vigo County, IN).”

9 p.m. (Ch. 13) Great Performances

The star-studded new episode “National Theatre: 50 Years on Stage” celebrates the British institution’s birthday with live performances and archival footage from some of the many productions it has hosted over the years. Participants include Judi Dench singing “Send in the Clowns” from “A Little Night Music,” Benedict Cumberbatch performing a scene from “Rosencrantz and Guildenstern are Dead” and Joan Plowright re-creating her star turn in “Saint Joan.”

10 p.m. (MAX) Banshee

Lucas (Antony Starr) makes a deal to save Jason (Harrison Thomas), whose past has caught up with him. Gordon and Deva (Rus Blackwell, Ryann Shane) find their lives spinning out of control in Carrie’s absence in the new episode “Armies of One.”

10 p.m. (ANPL) Ultimate Treehouses

In this new special, Pete Nelson of “Treehouse Masters” shows viewers some of the most interesting treehouses he didn’t build, sharing insights about the evolution of the treehouse and the various purposes it has served over the years. Featured are a tribal treehouse in Papua New Guinea, the world’s oldest backyard treehouse, one made from an airplane fuselage and some fully suspended biospheres — treehouses of the future.