1. At the start of the episode we see a teary-eyed Rick say a familiar line we've heard before.
"My mercy prevailed over my wrath," Rick says.
The line was said by Siddiq in the season eight premiere.
We now know the significance of that line has to do with Carl's final wish for his father to stop the war and to make peace with the Saviors.
It's significant that Rick's reciting a line said by Siddiq. Carl's new friend may help guide Rick in making some difficult decisions moving forward.
You may also remember there was a sign at the entrance to Alexandria which read, "Mercy for the lost, vengeance for the plunderers."
2. A flashback shows exactly when Carl was bit. But you still may be fuzzy on when it happened.
After surviving everything else, it was a bite to the side from a walker that wound up getting Carl in the end. Fans weren't happy about that.
If you thought the moment above didn't look familiar, you can definitely go back and find it earlier in the season.
Carl was bit on the sixth episode of season eight.
Siddiq had asked him at the time if we was fine. Carl lied and said yes.
If you were paying close attention, you probably noticed this months ago.
Then-showrunner Scott M. Gimple said on "Talking Dead" in December he was surprised no one saw the moment in the season's sixth episode.
"It's been on screen," Gimple said on the end of Sunday's "Talking Dead." "The aftermath is very much on screen. If you watch a certain episode and see Carl's face, Chandler [Riggs] did it."
Carl's untreatable walker bite was to the stomach.
Normally, a survivor will just get the infected wound amputated to stop the spread of the virus, but there was no cutting around a wound on Carl's torso.
Carl may not have died in the comics, but the way he went out is reminiscent of a recent death in the graphic series of the same name.
Similarly, Andrea suffered an untreatable zombie bite in a recent comic issue.
Her bite wound was to the neck. It left Carl's father devastated.
Everyone in the comic — even Negan — was able to bid farewell to Andrea in the May 2017 issue of the comic series. Carl's big episode felt like a similar tribute.
Episode director and executive producer Greg Nicotero said it wasn't a stretch to make the connection between the two deaths.
"Yeah, I think that's safe to say," said Nicotero. "Andrea's been gone for awhile on the show, unfortunately."
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