Although many fans of "The Walking Dead" were disappointed that the fate of longtime character Glenn (Steven Yeun) was not decided on Sunday's episode, the latest installment did answer another question: Morgan's (Lennie James) story.

According to Variety, Morgan's evolution from mad killer back to human was the main theme for the weekend's episode.

Before fans got a glimpse of him in Season 5, they had last seen Morgan when Rick (Andrew Lincoln), Carl (Chandler Riggs) and Michonne (Danai Gurira) visited King County. At that time, he had turned into a vengeful "kill or be killed" shadow of himself after losing his son. He had lost his ability to reason, but Rick was finally able to get through to him.

Despite Rick's efforts, Morgan left their encounter willing to kill everything that came his way, living or dead. As Sunday's episode revealed, that is when he happened upon Eastman (John Carroll Lynch), a man who was once in the same mindset as Morgan.

Even after Morgan repeatedly attempted to kill him, Eastman took him in. He used a cage to teach Morgan a new, non-lethal way of living, including a form of marshal arts called Aikido. Morgan replaced his violent habits with this non-lethal code, using it last season to subdue two Wolves who would later nearly kill Rick, calling into question Morgan's passive ways.

At the end of a flashback scene, a boy Morgan had killed returned as a Walker and bit Eastman. That turn of events weighed heavily on Morgan and his newly learned code, but Eastman still got to die on his own terms.

Pulling forward into the present, Morgan had knocked out a Wolf at the end of Episode 2. Fans learned that Morgan did not kill him, but rather tried to reason with him like Eastman had shown was possible. When that failed attempt, Morgan put the Wolf into a cage.

While the episode did nothing to advance Glenn's story, it provided fans a special glimpse into Morgan's life.

It might also be significant that Yeun's name no longer appears in the opening sequence of credits.