1) “The Twenties” debut, 10 and 10:30 p.m, BET. When Lena Waithe hit her 30s, everything clicked. She got a role in “Master of None,” winning an Emmy for an episode she wrote; she wrote and produced Showtime’s “The Chi” and the movie “Queen & Slim.” Now, at 35, Waithe goes back to her early struggles, when she was an assistant to the “Girlfriends” producer. “Twenties” focuses on three friends (shown here), struggling in Hollywood. It’s sometimes a drama, occasionally a comedy, always loosely likable.
2) “Dave” debut, 10 p.m., FXX. Colliding with “Twenties” is another show with the same general notion – a successful performer, looking back at the early struggles. Dave Burd, a Jewish kid from suburbia, found fame, doing funny raps as Lil Dicky. Here are two episodes, promptly rerunning at 11:15; in the funny opener, he tries to pierce the scorn and skepticism of black rappers.
3) “The Masked Singer,” 8 p.m, Fox. This has been rough on the great women of rock/pop history. Last week, Dionne Warwick (79, with six Grammys) was the second ouster from the six-person Group B. Earlier, Chaka Khan (66, 10 Grammys) was the third ouster from Group A. Both were dumped early, alongside a skateboarder and a comedian. Gladys Knight did finish 3rd in the first edition, but Patti LaBelle was eighth in the second. Tonight, one more “B” is ousted; others move to the semi-finals.
4) “Riverdale,” 8 p.m., CW. Archie, Betty and Veronica get tangled in a web of lies, as the town’s latest crisis builds. Complicating things: Betty’s mom is making a documentary about it.
5) Also: We’re going to make a point of NOT watching “Volcano Live,” in which Nik Wallenda attempts a 1,800-foot tightrope walk over a Nicaragua volcano; there’s no fun in watching something that could end in death. That’s from 8-10 p.m. on ABC, leading to the well-made “Stumptown”; tonight, a case causes Dex to flash back to her Afghanistan time.