What to watch on Wednesday, August 19...
SERIES PREMIERE, 8pm, 9pm, & 10pm, PBS
The Mystery of Matter: Search for the Elements
Through historical sources, dramatic reenactments, and host Michael Emerson, this three-part series chronicles some of the most important breakthroughs in the study of the building blocks of the universe. “Out of Thin Air (1754-1806)” kicks it off with Joseph Priestley and Antoine Lavoisier discovering oxygen. Then in “Unruly Elements (1859-1902),” Marie Curie and Dmitri Mendeleev each revolutionize chemistry. Finally, “Into the Atom (1910-1960)” focuses on Harry Moseley’s groundbreaking work in atomic physics and Glenn Seaborg’s creation of plutonium. [Note: Your PBS station may be showing the three parts over separate nights; check your local listings.]
The mystery box challenge in “A Storm’s a Brewing” centers on the use of coffee as a main ingredient. Later, the pressure test pushes pairs to prepare prodigious party platters.
8pm, ABC Family
Kevin From Work
After setting Kevin up with a buddy, Audrey succumbs to the green-eyed monster in “Who’s Your Friend From Work.” Elsewhere, Roxie tries her hand at an acting career.
SEASON 2B PREMIERE, 8:30pm, ABC Family
Young & Hungry
Back from her Swiss sojourn, Gabi takes a new gig with Josh’s neighbor as “Young & How Gabi Got Her Job Back” pushes this show’s title gimmick darn near to its breaking point. But when Josh suspects that Gabi’s new employer has the hots for her, his nosiness quickly hits “Mrs. Kravitz” levels.
SERIES FINALE, 9pm & 9:30pm, NBC
With budget cuts threatening the teachers in “Can’t Buy Me Love,” Craig hopes a fundraising auction can both save his job and open the door with Victoria. In other romantic travails, Samir, hopes to move things with Ashleigh from “like” to “like-like.” Then “School’s Out for Summer” wraps up the burnoff with Craig receiving an attractive offer from Earth, Wind and Fire—but taking it would mean bailing on his brother, friends, and students.
The virus works its whammy on Molly, dredging up old memories and plenty of snot. Meanwhile in “The Other Side,” Julie is at a crossroads and the Hybrids are out for revenge.
As she and her mom plan a dream wedding, Rachel frets that the ceremony could bring Mike’s secret to the surface. (Though honestly, they could probably just have the priest skip asking, “Do you promise to love, honor, obey, and never practice law without a valid degree even though you claim to have one?” Tradition be damned!) Elsewhere in “Uninvited Guests,” Hardman and Soloff make their play against Jessica and the partners.
A mysterious figure from Elliot’s past jeopardizes the Evil Corp hack in “eps1.8_m1rr0r1ng.qt.” The bright side, if you want to see it, is that it gives Elliot the chance to sing “our hack’s in jeopardy, bay-bee” as a cheeky parody of that Greg Kihn Band song.
10pm, Comedy Central
Key & Peele
A drive-by shooting, a car accident, a mother’s song for her son, and a con artist showdown are among the fodder in “MC Mom.” Other sketches find an “Undercover Boss” spilling the beans, and Big Boi bumping into André 3000.
10pm, TV Land
The Jim Gaffigan Show
Despite insisting that she wants no birthday festivities, Jeannie is irked when Jim celebrates Dave’s big day instead in “Go Shorty, It’s Your Birthday.”
10:30pm, TV Land
“Honor Thy Boyfriend’s Father and Mother” finds Buddy on both the giving end and the receiving end of big surprises. Meanwhile, Alexa gives Dora a few pointers on proper self-satisfaction. (Yes, that is a euphemism.)
11pm, TV Land
Phil visits a movie set and strikes up a romance with an actress in “Knotting Phil.” In less happy developments, Holly must serve someone a pink slip. (Also a euphemism.) (But for something different.) (Get your minds out of the gutter, people.)
– JB Smoove, Tig Notaro, and Langhorne Slim on Conan, 11pm, TBS
– Brett Gelman and Lil Rel Howery on The Nightly Show with Larry Wilmore, 11:30pm, Comedy Central
– Heidi Klum, David Oyelowo, Carly Rae Jepsen, and Bernard Fowler on The Tonight Show Starring Jimmy Fallon, 11:35pm, NBC
– Queen Latifah, John McEnroe, and Mumford and Sons on Jimmy Kimmel Live, 11:35pm, ABC
– Keegan-Michael Key, Tony Hale, MS MR, and Jimmy Chamberlin on Late Night with Seth Meyers, 12:35am, NBC
– Johnny Knoxville, Natasha Leggero, and Robin Thicke on The Late Late Show with James Corden, 12:37am, CBS