A generation later, it’s still hard to relive events of Sept. 11, 2001. Nonetheless to mark the 20th anniversary, here’s a six-part documentary series “9/11: One Day in America” (National Geographic, 9 p.m.) told from first-person narratives of first responders and survivors. It will be the first of what will be many grim commemorations.

Amber Riley, Alex Newell, Jennifer Nettles, and Cynthia Erivo are among those who participate in “Wicked in ConcertL: A Musical Celebration of the Iconic Broadway Score” (PBS, 9 p.m., check local listings). Original cast members Kristin Chenoweth and Idina Menzel appear, but only to host the concert event, shot in several locations. 

“The Godfather of Harlem” (EPIX, 9 p.m.) ends its second season with Bumpy awaiting his largest dope shipment while Malcolm X agrees to protection. 

“Evil” (Paramount+, streaming) resumes its second season after a month break.

The D.C. Metro system is all wrong on the new season of “The Walking Dead” (AMC, 9 p.m.). But the vibe inside the cars is about the same. 

The royal historian returns with the first of three episodes about the monarchy in “Lucy Worsley’s Royal Myths & Secrets” (PBS, 8 p.m., check local listings). 

I’m sort of enjoying the slow pace of the creepy “Chapelwaite” (Epix, 10 p.m.). 

It will have been a weekend of cheerleaders and chills with another two made-for-TV movie on the subject, “The Wrong Cheer Captain” (Lifetime, 8 p.m.) and “Cheer for Your Life” (Lifetime, 10 p.m.).