Highlights this week

Saturday

The Immortal Life of Henrietta Lacks 9:00 p.m. Deborah Lacks (Oprah Winfrey) and journalist Rebecca Skloot (Rose Byrne) learn how Henrietta Lacks’s cells were harvested to create the first immortal human cell line in “The Immortal Life of Henrietta Lacks,” premiering Saturday, April 22, on HBO. The film is based on the non-fiction bestseller of the same name.

Monday

Gotham 7:00 p.m. Nygma (Cory Michael Smith) decides he can succeed on his own without the Penguin (Robin Lord Taylor), and begins introducing himself as The Riddler in this new episode of “Gotham,” airing Monday, April 24, on Fox. Elsewhere, Gordon (Ben McKenzie) learns some upsetting news.

Wednesday

Fargo 11:00 p.m. While Gloria (Carrie Coon) is busy with a crime investigation, mysterious loner Vargas (David Thewlis) makes a move in a new episode of “Fargo,” airing Wednesday, April 26, on FX. Elsewhere, Ray (Ewan McGregor) and girlfriend Nikki (Mary Elizabeth Winstead) formulate a new plan.

Thursday

Chicago Med 8:00 p.m. Dr. Rhodes (Colin Donnell) finds himself fighting for the life of a mother who is desperate to save her daughter in a new episode of “Chicago Med,” airing Thursday, April 27, on NBC. Meanwhile, Dr. Charles (Oliver Platt) assigns his daughter’s psychological evaluation to Dr. Reese (Rachel DiPillo), but

can’t stop interfering.

Friday

Undercover Boss 7:00 p.m. Executives and other high-ranking employees leave their posh offices behind to work entry-level positions in their companies in a new season of “Undercover Boss,” premiering Friday, April 28, on CBS. The participants wear disguises as they gather information they hope will improve the business for their customers and employees.