Changes

Zachariah was a high-ranking [[angel]] in the [[Host of Heaven]] who served under [[Michael]], and holds held authority over lower-class [[angel]]s like [[Castiel]] and [[Joshua]]. Zachariah prefers preferred using mental manipulations to achieve his goals, going so far as to place [[Dean]] and [[Sam Winchester]] into [[Sandover Bridge & Iron Inc.]] with no memory of their true identities, to show that they are were not meant for normal lives and for to get them to agree to consent to be vessels and go forward with the Apocalypse.<ref name="four17">[[4.17 It's a Terrible Life]]</ref>

After his repeated failures in securing the Winchesters as vessels, Zachariah gets was removed from the [[Host of Heaven]], and retreats retreated to Earth to await his final judgement by drinking in a bar, but is was given a final chance to secure Dean for [[Michael]]. He resurrects resurrected and manipulates manipulated [[Adam Milligan]] in an attempt to draw Dean into a trap to get him to say yes to Michael. It seems seemed to work, but Dean taunts taunted him, allowing him to get close to him and then stabs stab Zachariah through the head with an [[angel blade]], killing him. His body is was last seen in the [[Green Room]] before it disappearsdisappeared.<ref name="five18">[[5.18 Point of No Return]]</ref>

Later, Zachariah appears to [[Adam]] in a dream talking about their plan and how he cannot trust the Winchesters. Adam gives up his location and disappears with Zachariah. [[Castiel]] leads Sam and Dean to the [[Green Room]] where Zachariah has hidden Adam. It is located in an abandoned muffler factory in Van Nuys, California. While in the [[Green Room]] with Adam, Zachariah reveals the truth about why they brought back Adam and how they are expecting Dean to come and consent. Meanwhile, [[Castiel]] enters the factory and clears the way for Sam and Dean by killing one angel and banishing four others (along with himself). Sam and Dean enter the shed containing the Green Room and Zachariah overpowers them. Zachariah then tortures [[Sam]] and [[Adam]] until [[Dean]] says "Yes." Thrilled, Zachariah calls [[Michael]] to come down to his [[vessel]], Dean. Dean then manipulates Zachariah, telling him that Michael cannot enter Dean's body unless he can guarantee the safety of his loved ones and until Zachariah is dead. Angry, Zachariah grabs hold of Dean, telling him "Michael's not going to kill me." However, Dean informs him that ''he'' will, pulls out a hidden [[angel blade]] , and stabs Zachariah through the chin and out the top of his head, killing him in an explosive burst of light that flings Dean into a wall. Zachariah's body is last seen leaning against a wall before the Green Room disappears, his body along with it.

In an alternate timeline caused by [[John Winchester]] getting pulled from 2003, Zachariah arrives in [[Lebanon, Kansas]] , with the alternate timeline [[Castiel]] to investigate. Walking into a nearby restaurant, Zachariah demands to know who has been messing with time, causing the patrons to think he's nuts after he claims to be from [[Heaven]]. Giving one final warning, Zachariah threatens to have Castiel murder them all otherwise and if someone does not answer, causing Castiel displays his wings.

The effects of Castiel displaying his wings draws the attention of [[Sam]] and [[Dean]] from outside and they , prompting them to enter the restaurant to investigate and , where they are shocked to find Zachariah. Zachariah is equally shocked to see themthe Winchesters, commenting that Heaven had big plans for the Winchesters brothers before their father disappeared. Zachariah quickly realizes that the Winchesters are responsible for what happened and orders Castiel to kill them. As Castiel takes on Dean, Zachariah begins choking Sam, demanding to know what he did. Zachariah taunts Sam, moving closer as he demands that Sam speak. Zachariah doesn't notice Sam draw an [[angel blade]] from his belt as he moves closer. Once Zachariah is in his face, Sam stabs him in the heart with the angel blade, killing Zachariahhim.