Season 2 of "Fear the Walking Dead" will have a lot of explaining to do when it returns this August. The midseason finale "Shiva" left viewers with a lot of questions following the cliffhanger ending. The back half of season 2 will focus on a lot of the characters' backstories that will help provide insight on their current situations.

According to showrunner Dave Erickson, Chris' meltdown was the result of his unstable past. He has a lot of pent-up rage toward his dad, especially after his parents divorced. Already feeling alone and alienated, the apocalypse exacerbated his already unstable sense of self. His turning point had been with killing Reed and having to deal with everybody thinking that he was a murderer. In the midseason finale, viewers saw Chris just really confused and overwhelmed.

When "Fear the Walking Dead" returns, Chris will try to come to terms with himself and how he fits in this world. Travis, for his part, will continue to hold on to his son. The upcoming episodes will show how both Travis and Chris will come to terms with the apocalypse.

On the other hand, viewers will continue to see a darker side of Madison when season 2 returns. Viewers will gain more insight about her and her past that will help explain why she does the things that she has done. Madison's reaction toward Celia is just like how she would have dealt with Nick's dealer had the apocalypse not happened.

"She has the ability to go to a violent place when the need arises," Erickson told TVLine.

In the final moments of "Shiva," Nick found himself separating from Strand and his family. According Erickson, his shift in ideology has a lot to do with his addictive personality. No longer able to access drugs, Nick's focus has shifted toward the dead.

"We connect something in the premiere of the back half. We find out he had something in his hand that we didn't know about that makes him a little bit less insane than to just walk off. He also reconnects with someone when we come back in episode 8," he added.

Season 2 of "Fear the Walking Dead" returns on Aug. 21, Sunday on AMC.