What's On Tonight (Sunday): Come and see an octopus' Secrets with me

Secrets of the Octopus

Killed them all, of course! Here's what's on television for tonight, Sunday, April 21!

Our Top Pick tonight is Secrets of the Octopus (National Geographic / Disney+ & Hulu, Monday). The third of James Cameron's fantastic Secrets Of titles, Octopus, narrated by Paul Rudd, dives into the world of these weird, unearthly sea creatures that have us rethinking theories on evolution and intelligence. Octopuses are immensely intelligent, curious, capable of planning, and connecting with other species. They're rather similar to humans. This series is definitely a must if you watched the Oscar-winner My Octopus Teacher and/or Nature's "Octopus: Making Contact." If only Cameron would spend his time on these kind of projects rather than those water Smurfs.

Elsewhere, Parish makes a difficult decision, Robert Durst is [*checks notes*] still dead, daycare Calls the Heart, the North gets high, the Tracker tracks, the Channel Islands have Minutes, Krapopolis is molting, and Jayda G explains Blue Carbon.

(All times are Eastern. All listings are new unless otherwise stated. For more listings, visit The Futon Critic or Zap2it.)

ON THIS SITE

Cancellation League (Morning): One week you're up, the next week you're down.

EARLY STREAMING & EVENING

60 Minutes (CBS, 7 p.m. / Paramount+, Monday): U.S. Secretary of Commerce Gina Raimondo... The history of the Channel Islands... comedian Kevin Hart.

📺 The John Larroquette Show (Rewind TV, 6 p.m.): John's nephew (Matt Borlenghi) learns the meaning of "tough love" when he shows up at the bus station.

Parish (AMC+, 3 a.m. & AMC, 9 p.m.): When Anton, an old colleague, learns Gray is working with the Tongais, he forces Gray to choose: his family or Horse. Rose and Makayla work together to survive. Horse searches for a traitor, otherwise it's off to the glue factory.

WHAT ELSE IS ON

🏀 2024 NBA Playoffs (TNT, 7 p.m.): Pacers vs. Bucks

🏒 2024 Stanley Cup Playoffs (ESPN2): Avalanche at Jets

America's Funniest Home Videos (ABC, 7 p.m. / Hulu, Monday)✔️

🎥 Point Break (The CW, 7 p.m. / Plex & The Roku Channel, now)

🇰🇷 Queen of Tears (Netflix, 8:20 a.m.)

⚾ Sunday Night Baseball (ESPN, 7 p.m.): Rangers at Braves

America's Funniest Home Videos (via Giphy)

🕗 8 P.M. EASTERN / 🕖 7 P.M. CENTRAL

The Equalizer (CBS / Paramount+, Monday): When a former Chinese agent is poisoned and comes to McCall for help, McCall tracks down the perpetrators and the antidote. Meanwhile, Aunt Vi encourages Dee to protest against a well-known climate change denier.

🎥 Have You Seen My Son? (Lifetime): "You've abandoned your son!"

Krapopolis (Fox, 8:30 p.m. / Hulu, Monday): A plague of Muses descends upon Krapopolis, and Deliria struggles to endure Shlub's centennial molting.

⭐ Secrets of the Octopus (National Geographic / Disney+ & Hulu, Monday): LIMITED SERIES. A 3-part, all-night event series. "Octopuses are like aliens on Earth: three hearts, blue blood, and the ability to squeeze through a space the size of their eyeball; they can use tools, transform their bodies to mimic other animals and even communicate with different species."✔️

The Simpsons (Fox / Hulu, Monday): "When someone in Homer's life passes away, he and some guys from Moe's go on a road trip to scatter the ashes."

WHAT ELSE IS ON

24 in 24: Last Chef Standing (Food Network & Max)

90 Day Fiancé: Happily Ever After? (TLC / Max, Monday)

American Idol (ABC / Hulu, Monday)

📡 Call the Midwife (PBS / PBS Passport, now)

📡 A Gentleman in Moscow (Paramount+ with Showtime [linear] / Paramount+ with Showtime [streaming], now)

Naked and Afraid (Discovery Channel / Max, Monday)

Random Acts (BYUtv): Season premiere

WWE's Most Wanted Treasures (A&E)

🕘 9 P.M. EASTERN / 🕗 8 P.M. CENTRAL

Beacon 23 (MGM+): Iris, keeper of Beacon 67, learns of Halan's distress on Beacon 23. She decides to go help and is stunned by the disrepair. As they go about reparing the beacon, a strange occurence leaves them confused and terrified.

🎥 Blue Carbon: Nature's Hidden Power (CNN): DJ and marine toxicologist Jayda G investigates blue carbon ecosystems.✔️

The Great North (Fox / Hulu, Monday): When Judy and Kima accidentally get high during a school field trip, they are sent on a mission to find treasure by a talking tub of cottage cheese named Beth. Wolf's signature sandwich is removed from the menu at Lydia's sandwich shop.

Grimsburg (Fox, 9:30 p.m. / Hulu, Monday): Marvin and the team investigate the death of a morning TV host, in which former child star Lil' Betsy is the main suspect.

The Sympathizer (HBO & Max): When he adjusts to life in Los Angeles, the Captain is forced to find someone to implicate when the General begins to suspect a mole.

Tracker (CBS / Paramount+, Monday): The tracker tracks a daughter that went missing 3 years ago.

When Calls the Heart (Hallmark Channel / Peacock, Monday): Rosemary and Bill team up to investigate a case they believe shouldn't be closed. The women of Hope Valley start a day care.

WHAT ELSE IS ON

🏀 2024 NBA Playoffs (TNT, 9:30 p.m.): Pelicans vs. Thunder

The Food That Built America (History): Season finale

📡 Mr Bates vs The Post Office (PBS)

Paranormal Caught on Camera (Travel Channel / Max, Monday): Season premiere

Summer House: Martha's Vineyard (Bravo / Peacock, Monday)

Unsung (TV One): Chingy

WWE's Most Wanted Treasures (A&E)

🕙 10 P.M. EASTERN / 🕘 9 P.M. CENTRAL

CSI: Vegas (CBS / Paramount+, Monday): The CSI team investigates a radioactive crime scene that left a father and son dead.

The Jinx: The Life and Deaths of Robert Durst (HBO & Max): SEASON PREMIERE. "An investigation into the life of real estate heir Robert Durst, and a series of murders and disappearances involving people close to him, includes an interview with the suspect himself."✔️

WHAT ELSE IS ON

🏒 2024 Stanley Cup Playoffs (ESPN): Predators at Canucks

📡 Alice & Jack (PBS / PBS Passport, now): Season finale

Bar Rescue (Paramount Network)

Secrets of the Hells Angels (A&E)

Uncensored (TV One): Raz-B

Watch What Happens Live with Andy Cohen (Bravo / Peacock, Monday): Selenis Leyva, Preston Mitchum

What Would You Do? (ABC / Hulu, Monday): Season finale

💤😴 LATE NIGHT 😴💤

📺 Police Woman (Get TV, 2 a.m.): Sgts. Pepper Anderson and Bill Crowley investigate the beating of a police rookie and murder of a pre-med student by a gang in a Polish neighborhood.

WHAT ELSE IS ON

Last Week Tonight with John Oliver (HBO & Max, 11 p.m.)

Love & Translation (TLC, 11 p.m. / Max, Monday): Season finale

The Jinx: The Life and Deaths of Robert Durst (via Giphy)

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Key Sources: The Futon Critic; IMDb; TV Passport; Zap2it
⭐: Top Pick
💲: Game show
📡: Linear broadcast

🇰🇷: Korean Drama
🎥: Movie
📺: Throwback

✔️: Video/gif/photo included

Happy watching, everyone!