The episode starts off with Marge waking up one morning and finding remnants of pizza boxes scattered around the living room. She hopes that a bear was the culprit, but instead Homer's groans lead Marge to find her husband on top of the kitchen table in nothing but his underwear. Marge tells Homer she wishes he would take his health seriously. Just when Homer seems to be taking Marge's words to heart, he marches upstairs to tell his wife that he will start taking care of himself only to have a heart attack and fall all down the stairs because he's out of shape. Cut to Homer's funeral at the church, where everyone in town grieves for the Simpson patriarch. Suddenly, Professor Frink interrupts the proceedings to announce that he has made a clone of Homer. Frink reasoned that he wanted to start out with a sheep first but chose he wanted to experiment with a simpler subject. Marge warns Homer to take this second chance seriously to which Homer asks if she made potato salad for the wake.
Fast forward to Homer's clone's funeral the next day, where a third Homer clone arrives. A montage then begins showing multiple Homer clones die due to his stupidity. The third Homer dies about 3 years later. The fourth Homer falls into the open grave of the third Homer. 1 year after that, the fifth Homer electrocutes himself with the toaster. No one knows what happens to the sixth Homer. 7 years after the original Homer's death, the seventh Homer lands in the hospital before pulling the plug on himself when he hears that he can't eat solid foods for two weeks. One of the clones is shown stacking up dozens of dead clone bodies to reach something on a high shelf, only for that clone to fall and die.Thirty years into the future, the Simpsons, now including Lisa's husband Milhouse and Bart's children and excluding Maggie, mourn another Homer clone's death, except that this time Frink cannot bring Homer back, much to the surprise of the family ,since Homer used up all of clones from brazen stupidity. Frink did store Homer's memory in a flash drive, which he plugs into a television screen conveniently in the church. Homer is now nothing but a face on a screen. The family is now at the Simpsons' house. While Bart's kids chase Homer's digital head around the house, Marge asks Milhouse how he is. He said except for the squirrel that eats their bird food he and Lisa have nothing to talk about. Lisa says that she told him during the conversation they had last month that she's been doing a lot of charity work for the undead. Marge realizes she is fed up with Homer's actions when he asks that she reboot the screen. She ejects the flash drive to give to Bart, so that Homer can reside with him.
Bart shows Homer his new digs, an abandoned classroom at Springfield Elementary. Bart then sends his two sons to his ex wife Jenda's home via teleporter door. After seeing Jenda and her new husband, Jerry, who is an alien, Bart tells Homer that he needs advice now more than ever. Homer is of no use when the monitor freezes. Working at a Cretaceous Park, a dino amusement park, Bart laments that he misses his kids despite Nelson telling him that he should be happy that he's free. Elsewhere at a zombie soup kitchen, as Lisa feeds the undead with synthetic vegan “brain” food, husband Milhouse comes looking for her, An annoyed Lisa questions why he's here. Milhouse says he was concerned that she wasn't responding to her phone, and he thought a zombie may have bit her. A zombie is offended by this, and Milhouse tries to take it back, but his rambling makes the situation worse. The zombie bites Milhouse's arm. Meanwhile, Bart is at a night club with Nelson, who is trying to set him up, saying that it's been two years since his divorce. After failing to impress a girl and being forced to leave the club due to making everyone feel depressed, Bart sees a targeted billboard telling him to move on using shock therapy that makes him forget about his ex. After the procedure, Bart sleeps with one woman after another, during which time Homer stops freezing up and is back to normal. However, he still has feelings for Jenda. One day, the same day Homer gets a robot body(the body is metal, while his head looks the same and can be detached from the body), his sons arrive via teleporter on hover scooters. Bart says they look happy, but they tell him that their mom is sad, and that Jerry moved out. Jenda is in tears revealing to Bart she was a fool for buying her new alien boyfriend, Jerry, a shedding tank he wanted, only for Jerry to humiliate her by ending their relationship and finding someone else. Bart calms her down by reminding her that her crying reminds him of what he lost and he's really trying to get his life back on track. Jenda is impressed with Bart and invites him for dinner out.
Meanwhile, Lisa and zombie Milhouse are attacked by Jimbo, Kearney and Dolph but Milhouse fights back by using Ralph Wiggum to knock them out and later cooks their brains. Even though Dr. Hibbert can reverse Milhouse, Lisa doesn't want to go through with reversal process because she actually finds the zombified Milhouse more attractive after seeing him attack the bullies because a normal Milhouse would not have had the guts to fight them off. Meanwhile, Homer's robot body is set on fire by his grandsons, and his appearance scares them away. After this, Santa's Little Hybrid approaches Homer, and says "Father, what am I?" Bart and Jenda have dinner at the Guilded Truffle, and they make a love connection, so they tell their kids they're going to try to make things work again. Later, the two are seen sitting together, Jenda is talking but she notices that Bart has not been paying attention and has been watching a sports game. Bart fires back and says SHE isn't paying attention either, she's texting. This argument leads to Jenda saying she thought things would be different this time. Bart goes to Moe's for a drink. And Lisa has already beat him there. She is drinking away her dilemma of trying to decide whether to make Milhouse human again or not. She even prefers his rotting meat smell. Marge is there too hidden conveniently behind a shrub as tall as her hair on the table. She points out they have no idea what a rough marriage is. They want to know her secret of how she stayed with Homer for so long. She says when you make a decision with your heart, you stick with it. Even Moe is taking care of Duff Man in his old age. Lisa asks if this means she is going to take Homer back. She states that she is in fact going to join him forever…as she electrocutes herself and transfers into the TV screen with him. A candy eating game appears in the background, Homer eats Marge's head, and a "GAME OVER" screen appears. Moe comments "I can't tell if that was love, suicide, or a really boring video game."
Back at Dr. Hibbert’s, Milhouse is now just fine, with no zombie left in him whatsoever. To prove this, Hibbert holds a brain in front of Milhouse, and he faints into Lisa's arms. Lisa disappointingly says "Hooray". Back at the house, Bart is explaining to Jenda, on the TV screen, that it just isn't working out. She agrees and she says that's why she started to see Jerry again without telling him. Bart then says that he now officially over her. is back in the chair at Moving On. Everything he just experienced was just a neural implant she put in his temporal lobe. It was all a dream and now he can go home. He just wants to make sure he is cured. She explains they treat a lot of people with obsessions…like Disco Stu, who is now "Nothing Stu". The next scene shows Homer, Marge, Bart, and Lisa in the basement of The Simpsons' house. Homer now has a sophisticated, C-3PO-esque robot body, and he is doing multiple chores, while Marge shows affection for his new form. Bart tells Lisa that in case her and Milhouse don’t work out he knows a place that can help her. He points out Milhouse was cured in his dream, but Lisa reveals that there is no cure for zombie-ism, therefore matters are great. Zombie Milhouse appears behind them and gives Lisa a dead flower, to which Lisa swoons over. Santa's Little Hybrid asks if he is fake, but to his disappointment Lisa says he is real.
Dennis Perkins of The A.V. Club gave the episode a C, saying "Things are even worse for The Simpsons after tonight’s sequel, “Days Of Future Future,” where Burns returns to the (it seems) inevitable sci-fi future of the series and limits the show’s world even more. Losing much of the heart of its predecessor in favor of the sort of ill-conceived and contradictory character arcs the latter, scattershot Simpsons has become notorious for, “Days Of Future Future” reveals a series willing to shrug off what it still could be. Instead, this future Simpsons world seems just a playground for writers to use up whatever Futurama jokes they had left over." Tony Sokol of Den of Geek gave the episode four out of five stars, saying "The Simpsons’s “Days of Future Future” is a laugh every 2.5 seconds, allowing for wind resistance. A very worth entry into what will someday be an even longer running longest running show that has ever walked slowly up a flight of stairs. I absolutely love Jerry, Bart’s future ex-wife’s new soon to be ex-Alien lover. Nelson’s mom still has to strip at the age of 87 because there’s no more retirement. Even with 99 Democrats in the Senate, because the Republican still knows how to get things his way. Of course Ralph Wiggum will be the new chief of police, he’s a chip of the old cop. Santa’s Little Hybrid is an unnatural progression that Cosmo doesn’t teach about."
Teresa Lopez of TV Fanatic gave the episode four out of five stars, saying "I always love The Simpsons episodes that show the possible futures of Bart, Lisa, Maggie, Homer and Marge. And this week was no exception. Even though the future episodes are not technically canon (I mean, who can say what will really happen in their future?), I liked that this one attempted some continuity." She did, however, criticize the episode's plot twist near the end, saying "What didn't work so well for me in this week's future glimpse was the way in which a portion of the show's events didn't actually take place. They were merely the work of the neural implant that the "Moving On" store used to help Bart get over his ex-wife. Although, the series did a nice job referring back to this little plot quirk at the end."
The episode received a 1.7 rating and was watched by a total of 3.64 million people, making it the second most watched show on Animation Domination that night, beating Bob's Burgers and American Dad! but losing to Family Guy with 4.39 million