9 details you may have missed on Sunday's 'The Walking Dead'

Daryl's suggestion gives Carol a small moment of pause as she asks him if he's sure. She knows that place holds a lot of memories for the group, but especially for Daryl.

Rick (seemingly) sacrificed himself in order to protect everyone else from a large group of the undead years ago when he blew up a bridge and fell into a river.

While the audience knows Rick is alive and (is likely) being held somewhere by the CRM (Civic Republic Military) against his will, Carol and Daryl are currently unaware of that. (Michonne is off searching for him.)

In the first few years after Rick's disappearance, Daryl spent a lot of time living in the woods by the river searching for the man he calls his brother.

On Sunday's episode, we also learned Daryl met someone else, Leah, who he cared for during his time in the woods.

It shouldn't be a surprise that Carol is a natural at fishing.

Carol started sailing off on fishing trips just to get away and clear her mind after Alpha brutally killed her adopted son Henry. She was probably used to catching fish all the time (even if she wasn't necessarily doing it with a spear in hand).

On the season 10 premiere, Carol returned back home and decided to stick around.

Rick left the show on season nine, episode five before the show jumped forward six years into the future.

At the time of the flashback on Sunday's episode, which is noted as occurring five years ago, Daryl was looking for Rick for two years. Carol makes a note of that when she visits him in the flashback.

Those are all the places where Daryl searched for Rick since his disappearance. One of the crossed off locations reads, "burnt barn."

Carol doesn't explain what she means by that, but she doesn't need to say more to Daryl. It's an understood secret language between the two of them.

Sophia famously went missing on the season two premiere of "TWD."

The two really began to forge a bond over searching for Carol's little girl. Daryl was one of the few who refused to give up searching for Sophia until she was found seven episodes later, dead and turned into a walker, in a barn.

Leah asks Daryl who he lost and he says, "my brother."

This wasn't the first time Daryl called Rick his brother.

At first, you may have thought he was talking about his actual brother, Merle, but then Daryl explains that they never found his body. Daryl saw Merle when he was turned into one of the undead.

At this point on Sunday's episode, Daryl had been searching for Rick for several years.

Daryl had helped Rick, Michonne, and Carl get away from a ruthless group of survivors on the road. Afterward, Daryl blamed himself for what could have happened if he didn't intervene.

As we see on Sunday's episode, Daryl has continued to blame himself for other losses over the year's that were out of his control, including Rick's on season nine.

On the season four finale, Rick looked at Daryl and told him it wasn't his fault, saying, "It's not on you." Right after that he calls Daryl his brother.

Ever since that moment, the two have had each other's backs over the years. It's one reason why Daryl never stopped looking for Rick years after he went missing.

Late on Sunday's episode, Daryl, once again, is holding himself responsible for Leah and Rick's disappearances.

"Stop thinking that every time you lose someone it's because of you, something you did wrong," Carol tells Daryl. "We all make mistakes. Losing Leah, that's not on you. Neither is Rick."

Daryl has had two of his closest friends tell him that very similar line, "It's not on you."

Showrunner Angela Kang told Insider as much when asked how we should interpret the scene where Leah reaches out for Daryl's hand and brings it forward slowly.

"There is some kind of a romantic relationship that existed," Kang told Insider.

This is a really tiny detail that was pointed out to us by fan @fftcocoon on Twitter that we can't unsee now.

Leah uses a red Swiss Army knife to free Daryl after tying him up. In a press photo for the episode, we see Daryl hand a knife to Carol. We can't see it in its entirety. But in another press photo, featuring Carol in season 10, episode 21, she's seen holding a red pocket knife that looks suspiciously similar to Leah's.