1) “Good Trouble,” 10 p.m., Freeform. The young people in this Los Angeles co-op usually have scattered lives, jobs and relationships. But now a brilliant screenplay blends them together – with subtle bits of drama and romance, plus big bursts of humor. A “new moon” ceremony (soul-cleansing and such) involves six of the residents (four are shown here, in a previous episode) and three invitees. Then someone else arrives … as does a mysterious critter. It all builds to a daft and delightful crescendo.
2) “Resident Alien” season-finale, 10 p.m., Syfy. Each week, this show does what “Good Trouble” does tonight – mixing clever comedy and solid drama into one package. So far, four people – Asta, her dad and two kids – know “Harry” is an alien in human form; none of them know that he’s here to kill all Earthlings. Now Asta’s friend has found a body in his freezer; this could be a problem.
3) “The Masked Singer,” 8 p.m., Fox. Danny Trejo has lived in scary places (San Quentin, for instance) and had creepy roles. He’s been cast as Machete seven times, Muerte six, Razor Charlie twice. Still, this show is the first to put him in a raccoon mask. Last week, he became the third person unmasked. (The others, Caitlyn Jenner and Kermit the Frog, were less scary.) Now here’s the fourth unmasking.
4) “Extinction: The Facts,” 8 p.m., PBS. Right now, scientists say, one-tenth of insects and one-fourth of plants face possible extinction. Some results are vivid; we meet the last two northern white rhinos. It’s a somber picture – with bits of hope: The pandemic’s global shutdown stalled eco-damage; many solutions would nudge the economy. And host David Attenborough, 94, shows his visit to Rwanda, when only 250 mountain gorillas remained; after a half-century of conservation, there are now 1,000.
5) “Snowfall,” 10 p.m., FX, rerunning at 11:11. As the crack cocaine business booms in 1980s Los Angeles, ominous signs appear. A rival gangster has a $5,000 bounty on Leon, dead or alive …. $50 million has vanished from a CIA agent’s guns-for-drugs plan … and Franklin’s father may reveal the CIA scheme. It’s a strong hour, peaking with verbal explosions between Franklin and his parents.