"If You’re Not in the Obit, Eat Breakfast" (HBO at 8) In this documentary, veteran comedian Carl Reiner, left, interviews Betty White and other entertainers over 90, including Mel Brooks, Dick Van Dyke and Norman Lear, to find out what has kept them thriving in their later years. (HBO)

(All times Eastern).

The Bachelorette (ABC at 8) Six guys accompany Rachel on a group date to “The Ellen DeGeneres Show.”

Better Call Saul (AMC at 10) Jimmy is pushed to take drastic measures.

Still Star-Crossed (ABC at 10) Rosaline struggles to accept Prince Escalus’s decree.

Premieres

The Heart Guy (Acorn TV) This Australian dramedy follows a heart surgeon who is forced to return to his small hometown and work as a local doctor after his personal life unravels.

Daytime Divas (VH1 at 10) This drama revolves around a group of women who host TV’s longest-running daytime chat show, with all of their behind-the-scenes spats and foibles. Vanessa Williams, Tichina Arnold and Fiona Gubelmann star.

#Murder (TV One at 10) This docuseries explores deadly crimes linked to technology.

Incredible Edible America With the Dunhams (Food at 10) Popular ventriloquist Jeff Dunham and his food blogger wife hit the road in search of the nation’s best meals.

DocumentaRY

Bill Cosby: An American Scandal (Investigation Discovery at 9) As Bill Cosby’s sexual assault trial begins, this documentary special looks at the allegations against the comedian.

Finale

Gotham (Fox at 8) Recurring guest star Jada Pinkett-Smith returns in the two-hour Season 3 finale.

Returning

Shadowhunters (Freeform at 8) Midseason return.

Stitchers (Freeform at 9) Season 3.

Late Night

Conan (TBS at 11) Sarah Silverman, Shawn Hatosy, Alt-J.

Daily Show (Comedy Central at 11) William J. Barber II.

Fallon (NBC at 11:34) John Lithgow, Riley Keough, Giles Martin, Thundercat, Michael McDonald, Kenny Loggins.

Colbert (CBS at 11:35) Kevin Hart, Ali Wentworth, The War on Drugs.

Kimmel (ABC at 11:35) Gwyneth Paltrow, Sean “Diddy” Combs, Ryan Adams.

Corden (CBS at 12:37) Gordon Ramsay, Michael Strahan.

Bethonie Butler