Saddest TV Pet Deaths of All Time: Chicago Fire’s Tuesday, Fuller House’s Cosmo and More

Credit: Fox Tv/Seth Macfarlane/Kobal/Shutterstock; Kailey Schwerman/SHOWTIME; YouTube

Saddest TV Pet Deaths of All Time: Chicago Fire’s Tuesday, Fuller House’s Cosmo and More

Saying goodbye to their TV best friends. While many series feature adorable pets in their episodes, a few have aired heartbreaking scenes after the animals died.

“With the season 10 finale also comes Tuesday's last episode on Chicago Fire,” dog trainer Christine Mahaney wrote via Instagram in May 2022, announcing the death of the TV dalmatian. “It breaks my heart to share that Tuesday passed away on Sunday, May 22, due to unforeseen kidney issues. The love from you, Tuesday's fans, over the past 4 years has been immense.”

The WhatADog founder concluded her post: “Allowing her into your homes and hearts will forever be cherished. Tuesday loved working on set and being a part of the Chicago Fire family. Her tail never stopped wagging. She truly was very special.”

While Tuesday’s last appearance on the NBC drama as the firehouse dog aired later that month, the show did not immediately announce how they would address the pup’s passing the next season.

Fuller House, which aired new episodes on Netflix between 2016 and 2020, also grieved the loss of beloved dog Cosmo in December 2019.

“We’re sad to share that the Fullers’ faithful dog Cosmo, who grew up on our set, passed away after complications from surgery. There will never be another quite like our boy. 💛 We’ll miss him forever,” a statement from the Netflix series read via Twitter at the time.

Upon the revival’s premiere, it was confirmed that the golden retriever was the great-grandson of Comet, who was the OG Tanner family dog on Full House.

“Our sweet boy Cosmo is now running around in doggy heaven,” dog lover Candace Cameron Bure, who played D.J. Tanner in both series, wrote via Instagram after learning of the pup’s passing. “I imagine he’s playing with Comet 😉 right now. Cosmo has been in Fuller House since the start and we are heartbroken that he passed away during surgery complications. You’ll be so missed love bug ❤️.”

Other shows, including Grey’s Anatomy and Marvel’s WandaVision, have made the loss of pets a central story line.

WandaVision, the Emmy-nominated Disney+ miniseries starring Elizabeth Olsen as Wanda Maximoff/Scarlet Witch, premiered in January 2021. The series began with Wanda, who was still reeling from Vision’s Avengers: Endgame death, conjuring a fictitious town where she could live with an imagined version of Paul Bettany’s character and their twin sons, Tommy and Billy. The bewitching family were also doting puppy parents to Sparky after the boys found him roaming the Westview neighborhood. It was eventually revealed that Sparky had gotten into an accident before his death, in which Agnes (Kathryn Hahn) claimed to have found the pooch lying in her azalea bushes.

While Sparky’s disappearance became a central mystery on the show, fans were clued in after Agnes was revealed to be Salem witch Agatha Harkness.

“Who's been messing up everything? It's been Agatha all along,” the How to Lose a Guy in 10 Days actress sang in her “Agatha All Along” theme song, which ended with a big reveal. “And I killed Sparky too!”

Scroll below for more of TV’s saddest pet deaths through the years:

Credit: Fox Tv/Seth Macfarlane/Kobal/Shutterstock; Kailey Schwerman/SHOWTIME; YouTube

Saddest TV Pet Deaths of All Time: Chicago Fire’s Tuesday, Fuller House’s Cosmo and More

Saying goodbye to their TV best friends. While many series feature adorable pets in their episodes, a few have aired heartbreaking scenes after the animals died.

“With the season 10 finale also comes Tuesday's last episode on Chicago Fire,” dog trainer Christine Mahaney wrote via Instagram in May 2022, announcing the death of the TV dalmatian. “It breaks my heart to share that Tuesday passed away on Sunday, May 22, due to unforeseen kidney issues. The love from you, Tuesday's fans, over the past 4 years has been immense.”

The WhatADog founder concluded her post: “Allowing her into your homes and hearts will forever be cherished. Tuesday loved working on set and being a part of the Chicago Fire family. Her tail never stopped wagging. She truly was very special.”

While Tuesday’s last appearance on the NBC drama as the firehouse dog aired later that month, the show did not immediately announce how they would address the pup’s passing the next season.

Fuller House, which aired new episodes on Netflix between 2016 and 2020, also grieved the loss of beloved dog Cosmo in December 2019.

“We’re sad to share that the Fullers’ faithful dog Cosmo, who grew up on our set, passed away after complications from surgery. There will never be another quite like our boy. 💛 We’ll miss him forever,” a statement from the Netflix series read via Twitter at the time.

Upon the revival’s premiere, it was confirmed that the golden retriever was the great-grandson of Comet, who was the OG Tanner family dog on Full House.

“Our sweet boy Cosmo is now running around in doggy heaven,” dog lover Candace Cameron Bure, who played D.J. Tanner in both series, wrote via Instagram after learning of the pup’s passing. “I imagine he’s playing with Comet 😉 right now. Cosmo has been in Fuller House since the start and we are heartbroken that he passed away during surgery complications. You’ll be so missed love bug ❤️.”

Other shows, including Grey’s Anatomy and Marvel’s WandaVision, have made the loss of pets a central story line.

WandaVision, the Emmy-nominated Disney+ miniseries starring Elizabeth Olsen as Wanda Maximoff/Scarlet Witch, premiered in January 2021. The series began with Wanda, who was still reeling from Vision’s Avengers: Endgame death, conjuring a fictitious town where she could live with an imagined version of Paul Bettany’s character and their twin sons, Tommy and Billy. The bewitching family were also doting puppy parents to Sparky after the boys found him roaming the Westview neighborhood. It was eventually revealed that Sparky had gotten into an accident before his death, in which Agnes (Kathryn Hahn) claimed to have found the pooch lying in her azalea bushes.

While Sparky’s disappearance became a central mystery on the show, fans were clued in after Agnes was revealed to be Salem witch Agatha Harkness.

“Who's been messing up everything? It's been Agatha all along,” the How to Lose a Guy in 10 Days actress sang in her “Agatha All Along” theme song, which ended with a big reveal. “And I killed Sparky too!”

Scroll below for more of TV’s saddest pet deaths through the years:

Credit: Adrian S. Burrows Sr./NBC

Tuesday, ‘Chicago Fire’

Darren Ritter (played by Daniel Kyri) adopted the dalmatian in season 7, frequently bringing her to the station amid separation anxiety struggles on the canine’s part. Tuesday eventually won over the rest of the crew and became the house dog ahead of the real-life pup’s May 2022 passing.

Credit: Mike Yarish/NETFLIX

Cosmo, ‘Fuller House’

After the Tanner daughters — D.J., Stephanie and Michelle, played by Bure, Jodie Sweetin and Mary-Kate and Ashley Olsen, respectively — took care of Comet in Full House, it was D.J.’s three sons’ turn in the reboot. The Fuller House kids, led by second son Max, loved their sweetie Cosmo ever since he was a puppy prior to his death.

Credit: YouTube

Doc, ‘Grey’s Anatomy’

To cope with her breakup from Derek (Patrick Dempsey), surgical resident Meredith (Ellen Pompeo) adopted rambunctious pup Doc. While roommates Izzy and George did not like the pup due to his penchant to chew their belongings, Doc went to live with Derek and then-wife Addison (Kate Walsh) in their trailer in the woods. Meredith still dutifully coparented the pup until he was diagnosed with bone cancer and they sadly decided to euthanize the pup in season 2. Since Doc’s death, Meredith has frequently memorialized the pup in season 3 and season 15 episodes.

Credit: YouTube

Lady, ‘Game of Thrones’

The HBO fantasy series had an expansive pack of dire wolves, which were bonded to the various characters. Lady, for her part, was connected to Sansa Stark (Sophie Turner) ahead of her gruesome death at the hands of Cersei Lannister (Lena Headey) in the first season. Turner had such a strong bond with Zunni, who played the wolf, that she adopted him after the pup’s onscreen demise. Zunni later died in 2017.

Credit: Fox Tv/Seth Macfarlane/Kobal/Shutterstock

Brian, ‘Family Guy’

The beloved Family Guy pooch was struck by a car during a November 2013 episode of the animated series. Show creator Seth MacFarlane told reporters at the time that he decided to kill off the family pet because “it reminded people this is still a show where anything can happen despite the fact it's been on for awhile.”

Credit: Showtime/Kobal/Shutterstock

Sounder, ‘The L Word’

After Jenny Schecter (Mia Kirshner) received a bad review on her Lez Girls book, she decides to redirect her energy by adopting a homeless dog. However, it is soon revealed that the canine needs to be put down. 

Credit: YouTube

Isis, ‘Downton Abbey’

On the historical drama, Robert Crawley (played by Hugh Bonneville) was a proud dog parent to Isis. It was eventually known in season 5 that the pup had cancer and was on her deathbed.

“We always try to fudge time in Downton because if you analyze it too closely you'd go nuts. That is one of the reasons we got rid of the dog – someone had done some nerdy chart working out how old all the characters would be if we started in 1912," Bonneville told The Sun in February 2019. "They’d worked out by the time we got to series six, the dog should be dead. So I said, ‘Wouldn’t it be fun to kill the dog?’ Because, let’s face it, most British men at this time are more attached to their dog than their children. It would get the dog lovers at home weeping.”

Credit: YouTube

Sparky, ‘WandaVision’

While MCU fans did not see how Agatha murdered the pup, her “Agatha All Along” number confirmed the speculation.

Credit: Kailey Schwerman/SHOWTIME

Biscuit, ‘Yellowjackets’

Biscuit was the beloved family pet of the Abara-Turner family of Taissa Turner (Tawny Cypress), wife Simone (Rukiya Bernard) and their son, Sammy (Aiden Stoxx). While fans — and Sammy — were led to believe that Biscuit had gone missing, he was actually killed by Taissa in a sleepwalking state. (Taissa had been struggling in the wake of surviving the plane crash.)