Zeke appears to have died in the first season of Manifest when he was trapped in a blizzard. However, he was found by Cal Stone (Jack Messina), a passenger on Flight 828 after seeing the Callings.

Why is Zeke dying on Manifest?

It's believed that Zeke's commitment to following the Callings resulted in him beating the Death Date. The weird thing is though, now that Zeke has conquered his Death Date, he no longer has Callings and instead has developed intense empath skills.

How did Zeke kill Chloe?

What had he done wrong? Zeke holds himself responsible for killing his sister. When he was fifteen, he had agreed to take her up to a ravine but wound up taking a phone call from a girl. He wasn't paying attention and she wound up falling in.