Morgan was the first person that Rick (Andrew Lincoln) encountered when he woke up from his coma in Season One. Morgan had saved the life of the former policeman, who was disoriented and unaware of the zombie apocalypse plaguing the world since he was hospitalized.
As he adjusted to the new situation, Rick briefly stayed with Morgan and his young son, Duane (Adrian Kali Turner). The father and son taught Rick how to defend himself and parted ways after raiding the local police station for guns and ammunition.
Rick wanted to leave the area and search for his family in Atlanta; however, Morgan couldn’t leave until he killed his "walker" wife.
Rick held onto a radio throughout Season One as a way for Morgan to get in touch if he decided to head to Atlanta. Many episodes led off with Rick talking into the radio to an unavailable Morgan.
Morgan had refused to return with Rick’s group, who were staying at the prison at the time. The character’s fate remained a mystery until this season. Wearing a mask to cover his face, Morgan had been tracking man-made marks throughout the woods.
TVLine has reported that the Walking Dead spin-off will focus on two small families as well as another character, comprising the six central figures in the spin-off series. There will be the Cabreras, a father and son; the Tompkins, a single mother with two teenaged children; and Andrea Chapman, who is reeling from her own personal tragedy.
The full cast as listed by TVLine includes:
SEAN CABRERA | A Latino male in his early 40s, Sean is a good man trying to do right by everyone in his life.
CODY CABRERA | Sean's whip-smart and rebellious teenage son. Known as the angriest kid in town.
NANCY TOMPKINS | A thirtysomething single mom to two kids, Nancy looks like the girl next door, but there's an edge to her.
NICK TOMPKINS | Nancy's screwed up teenage son. He's too old to stay home, too scared to flee.
ASHLEY TOMPKINS | Nancy's mostly level-headed teenage daughter. Her ambition is in direct proportion to her older brother's failures. She loves her mom but it's time to get out of Dodge.
ANDREA CHAPMAN | A somewhat wilted flower child, fortysomething Andrea — yep, another Andrea! — has retreated to the outskirts of the city to recover after a horrible marriage.
So far there is no official word that Williams or James will be in the new series, or in next season of The Walking Dead, so we feel that as guest characters, the pair will serve as a bridge between the two shows, and possibly hopping in between them in the future.