What To Watch: Riverdale And Nancy Drew End, Grown-Ish Goes On Break, Invasion Returns, First GOP Debate And More

On TV this Wednesday: Riverdale ends its run, the Drew Crew solves its final mystery and Donald Trump's competitors duke it out in the first Republican primary debate. Here are 12 programs to keep on your radar. (Also check out our weekly TVLine-Up of premieres and finales, plus our monthly streaming guide.)

Showtimes for August 23, 2023

ET

Invasion

Apple TV+

Season 2 premiere: Mitsuki is taken to an alien ship in the Amazon jungle; Aneesha and her children take refuge with a
mysterious group. (Watch trailer.)

Physical

Apple TV+

Sheila risks her most important business partnership; Danny reaches out for help; Breem struggles to support his wife.

The Ultimatum: Marry or Move On

Netflix

Season 2 premiere (first eight episodes): You know the drill! Five couples find themselves at a crossroads, with one partner ready to get married and the other not so sure. (Watch trailer.)

ET

America's Got Talent

NBC

The first results show of Season 18 will reveal which two acts from Tuesday's show advance to the final round of the competition.

MasterChef

Fox

The chefs must prepare a gourmet meal out of army rations; those remaining will tackle the classic tag team challenge in which they take turns preparing a three-course meal.

Nancy Drew

The CW

Series finale: The Drew Crew must contend with a shocking discovery that will determine the fate of Nancy's relationship with Ace.

ET

BS High

HBO

Documentary premiere: Explore the lucrative and cutthroat world of football prep programs involving large-scale fraud and widespread devastation stemming from one man’s lies.

Republican Primary Debate

Fox News

Participants include former president Donald Trump Florida Gov. Ron DeSantis, former New Jersey Gov. Chris Christie, former VP Mike Pence, tech entrepreneur Vivek Ramaswamy, former South Carolina Gov. Nikki Haley and South Carolina Sen. Tim Scott; Bret Baier and Martha MacCallum moderate.

Riverdale

The CW

Series finale: In the present day, an 86-year-old Betty (!) relies on a special friend to help her relive her last day of senior year. (Watch exclusive trailer.)

Superfan

CBS

Five of Gloria Estefan's most devoted supporters battle it out to be crowned her ultimate [see series title].

Temptation Island

USA Network

Season 5 finale: The couples reunite for their final bonfires. Then in a 90-minute reunion special, couples and singles return to unpack their experiences on the island.

ET

grown-ish

Freeform

Midseason finale: Andre tries negotiating a high-stakes contract on Annika's behalf; Aaron wants to take his new relationship to the next level, but... (get scoop).

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