1) “American Experience,” 9-11 p.m., PBS. Five weeks before Woodstock, promoters had a mega-list of performers — and nowhere to play. Banned in one town, they scrambled to find another. They barely got the stage finished … never did get the fences … and saw the masses swarm in. Food was scarce, mud was abundant and traffic was so snarled that the performers needed helicopters. This could have been a disaster, but people who were there recall it fondly. Here’s a terrific, 50th-anniversary portrait. And for a full Woodstock story, scroll down this page or jump to the “stories” category.
2) “Good Trouble” season-finale, 8 p.m., Freeform. After arriving in Los Angeles with talent and optimism, these foster sisters have received jolts. Now Callie, the lawyer, decides to make a change; Mariana, the computer engineer, learns what happened to another woman at her workplace.
3) “Blood & Treasure” season-finale, 10 p.m., CBS. This summertime series started with Farouk’s evil forces plundering an Egyptian tomb, but failing to find Cleopatra’s remains. Two attractive strangers, Danny and Lexi, went in persuit. Now secrets are exposed as Farouk launches a master plan.
4) Undercover Billionaire” debut, 10 p.m., Discovery. A generation ago, Glenn Stearns reached California with no job, home or money; he built what’s now a giant finance company. But could he do it again? This show sends him to Erie, Pa., with $100 and a secret identity. It gives him 90 days to assemble a team and start a company, with some of the people getting a stake in it. Afterward, the company is evaluated; if it’s below $1 million, Stearns will put a million of his own money into it.
5) “Bless This Mess” return, 10 p.m., ABC. This was a tough season for comedies – and a tougher summer, with many of them bumped by reality shows. “Mess,” however, has provided some bursts of fun. Barring another late change, here’s a rerun of the funny pilot: City folks (Dax Shepard and Lake Bell) plan to become farmers. Locals (Pam Grier and Ed Begley Jr.) have their doubts.