The life and career of Sidney Poitier are explored in Reginald Hudlin’s documentary “Sidney” (Apple TV+, streaming), produced by Oprah Winfrey. Home movies from the Poitier family are augmented by interviews with stars including Denzel Washington, Halle Berry, Robert Redford and Spike Lee. 

Alison Janney stars as a woman asked to help another mother’s march for a kidnapped daughter in the new film “Lou” (Netflix, streaming),, also starring Jurnee Smollett. 

Kearstin Piper Brown stars in the opera “Intimate Apparel,” about a seamstress, with a libretto by Lynn Nottage. It’s on “Great Performances” (PBS, 9 p.m., check local listings).

New seasons begin for “Shark Tank” (ABC, 8 p.m.) — its 14th — and “20/20” (ABC, 9 p.m.) — its 45th. 

The new film “On the Come Up” (Paramount+, streaming) stars Jamila C. Gray as a teen who becomes a battle rapper, based on Angie Thomas’ young adult novel. Actress Sanaa Lathan makes her director debut. 

From Spain comes the six-part series ‘The Girls at the Back” (Netflix, streaming), about a group of women in their 30s whose annual getaway has a shift when one is diagnosed with cancer. 

From France comes the thriller “Athena” (Netflix, streaming) about three siblings whose youngest brother dies a mysterious death. 

“Big Brother” (CBS, 8 p.m.) has its final three reflect on their journeys before Sunday’s finale.