The pilot episode "Emissary" Introducing myself to Benjamin Sisko and his personal story of him grieving the death of his wife Jennifer and having to raise his son by himself. Reluctant to take this mission by the edge of the frontier, that was completely forgotten by Season 4, he went face to face with the person he felt responsible for his wife's death and there's no question the anger he had towards that man. Later getting consumed by the wormhole and making first contact with the aliens within it; he gauges into his first meeting with Jennifer and explaining the concept of linear time. His recollection of his late wife and events that followed moved me because the aliens were making him understand he was not linear, he couldn't move on from the past and his pain and loss was so deep he couldn't let go. The conclusion was heartfelt & it open the door for him to be a new man. A space, quasi-spiritual cleansing of his soul, this was the drinking of the elixir for my favorite Deep Space Nine character, and when he returned from the Wormhole he became the Emissary. For people who had suffered loss, and despair and being a figure who can take on anything.