Competitive fishing shows in the wake of its own “Deadliest Catch” is not given as a reason, but cod has so diminished in the waters off New England, there’s a question to whether a healthy population can be sustained. Overfishing, government policy and climate change are among the reasons given for the collapse. And as the documentary “Sacred Cod” (Discovery, 9 p.m.) notes, there is a current ban on cod fishing by the National Oceanic and Atmospheric Administration. Fishermen aren’t happy.
“Scandal” (ABC, 9 p.m.) reaches its 100th episode, a special one in which Olivia wonders what would have happened if the election turned out differently.
“Casey Anthony: An American Murder Mystery” (TLC, 8 p.m.) gives the true crime documentary series to the case of the Florida woman who claimed her two year old had been taken.
“Dark Net” (Showtime, 10 p.m.) returns for a second season, profiling a digital activist.
The first season of the offshoot “The Blacklist: Redemption” (NBC, 10 p.m.) comes to an end.
So does the first season of “Sun Records” (CMT, 10 p.m.) in which Johnny Cash goes off on his own and Elvis gets a new manager. 4
“The Amazing Race” (CBS, 10 p.m.) heads to Zanzibar.
Molly Ringwald plays Archie’s mom on “Riverdale” (The CW, 9 p.m.).
On “The Big Bang Theory” (CBS, 8 p.m.), Howard and Bernadette leave their baby at day care for the first time.
Meredith and Nathan fly together on “Grey’s Anatomy” (ABC, 8 p.m.).
For a better look at the work of the comedian just named to host the White House Correspondent’s Dinner later this month, “The Daily Show with Trevor Noah” (Comedy Central, 11 p.m.) ends a week of clip shows with the work of Hasan Minaj.
A woman considers dropping out of the experiment of “60 Days In” (A&E, 9 p.m.).
Teams work on a gingerbread house on “MasterChef Junior” (Fox, 8 p.m.).
A man with the head of a goat is sought on “Supernatural” (The CW, 8 p.m.).
On “Powerless” (NBC, 8:30 p.m.), Emily gets the Green Fury to help her at the board meeting.
Jack gets in a spat with the I.T. guy on “The Great Indoors” (CBS, 8:30 p.m.).
A doctor’s father is admitted to “Chicago Med” (NBC, 9 p.m.).
Two teams face elimination on “Kicking & Screaming” (Fox, 9 p.m.).
Matt and Colleen have a tough time babysitting Lark on “Life in Pieces” (CBS, 9:30 p.m.).
Turner Classic Movies’ salute to character actors continues with two women better known for their witchy work in “The Wizard of Oz” — Margaret Hamilton in “Babes in Arms” (8 p.m.), and Billie Burke in “Topper Takes a Trip” (10 p.m.). Then comes Fay Bainter in “Journey for Margaret” (11:45 p.m.) and Beulah Bondi in “Sister Kenny” (1:30 a.m.).
First round play in the Stanley Cup playoffs has Toronto at Washington (USA, 7 p.m.), Nashville at Chicago (NBC Sports, 8 p.m.) and Calgary at Anaheim (NBC Sports, 10:30 p.m.).
Baseball includes Dodgers at Cubs (MLB, 2 p.m.), Texas at Angels (MLB, 5 p.m.) and Calgary at Anaheim (NBC Sports, 10:30 p.m.).
In basketball, it’s time for the WNBA Draft (ESPN2, 7 p.m.).
Daytime Talk
Kelly Ripa: Anna Chlumsky, Carrie Ann Inaba. The View: Martha Stewart, Tyson Beckford. The Talk: Jimmy Smits. Harry Connick: Meagan Good, Haley Lu Richardson. Ellen DeGeneres: Chris Hardwick, Kunal Nayyar, Ashley Benson, Lucy Hale, Sasha Pieterse, ShayMitchell, Troian Bellisario. Wendy Williams: Natalie Zea.
Late Talk
Stephen Colbert: Anderson Cooper, Judd Apatow, Jidenna (rerun). Jimmy Kimmel: Charlize Theron, Tony Goldwyn, Romeo Santos. Jimmy Fallon: Aaron Paul, Keri Russell, 2 Chainz with Gucci Mane (rerun). Seth Meyers: Ewan McGregor, Zoe Kravitz, Jon Pardi, Nicko McBrain (rerun). James Corden: Michelle Monaghan, Bradley Whitford, London Grammar (rerun). Carson Daly: R.J. Tyler, Deap Vally, Trevor Jackson (rerun).