1) “Dead Pixels” debut, 8 p.m., CW. For years, these folks have been obsessed with a videogame. We see their avatars in the game; we also see furtive forays into the outside world. In their cubicle jobs, they only switch to work when the boss walks by. Meg (Alexa Davies, shown here) can’t focus on dating … or Usman on child-care … or Nicky on having any kind of life. Then a hot guy at Meg’s work complicates things. This British import has witty scripts (sometimes complicated by the accents) and thoroughly likable people.
2) Democratic convention, 8-11 p.m ET., PBS; 10-11 p.m. ET, ABC, CBS and NBC; all day, news channels and C-SPAN. At 9 p.m.ET, it will be time for the keynote speaker and a roll call – in this case, a “roll call across America,” with virtual voting from 57 states and territories. Other scheduled speakers (subject to change) are Sally Yates (former acting attorney general), Chuck Schumer, John Kerry, Alexandria Ocasio-Cortez, Lisa Blunt Rochester (Delaware’s U.S. representative), Bill Clinton and Jill Biden.
3) “America’s Got Talent,” 8-10 p.m., NBC. Last week had 11 wide-ranging acts, but viewers settled for singers; promoted to the semi-finals were four music acts and a sword-swallower. That means the pig act is done … but tonight has a dog act. It also has five music acts, two dance groups, a daredevil, an impressionist and two guys who do odd things (beyond yo-yo or juggling) with a “diablo” toy.
4) “Modern Family,” 8 and 8:30 p.m., ABC. In the first rerun, Gloria secretly baptizes the twins; in the second, Dylan’s hippie mom moves in. That’s followed at 9 (an hour earlier than usual) by “What Would You Do?” The hidden-camera show sets up a debate between a teen and his anti-vaccine mom.
5) “Tell Me a Story,” 9 p.m., CW. Kayla wakes up in a place she shouldn’t be – her high school English teacher’s bed; coming are tense moments with her grandmother (Kim Cattrall) and a persistent classmate. Also, Jordan (the terrific James Wolk) bypasses police as he looks for the robbers who accidentally killed his fiancee. And Gabe and his sister are on the run, after he accidentally killed someone (that seems to happen a lot) and got a pile of money. It’s a strong, solid episode.