Using
Davos is the first one to be able to travel through time. He is a prisoner during World War III, and the scientists find that he is the first to be able to withstand the physical and psychological demands of time travel. He is able to find help for the people. But in the end is merely being used by the scientists who determine that his life must end regardless of the great service he's done for his people.
Trauma
Davos is haunted by one specific image in the story. That of a murder happening in front of him as a child at The Jetty. He doesn't know why it's troubled him all of his life, but this is revealed when he discovers that he witnessed his own death as the man who was killed was actually him from the future who has traveled back in time. This theme reveals the always present, never tangibly seen element of connection to who we are. And when his life is ended, he as a young boy experiences this loss and knows it at a young at though he doesn't understand it. And his whole life then is about this one singular moment, the defining moment of his life.
Time Travel
Time travel is a main theme of this featurette, as we witness Davos successfully travel back to his memory of a murder at The Jetty of an airport and into the future. He does so in order to find help for the people of his present day who have survived World War III and are seeking help from different time periods in order to stop the War and save humanity. This theme reveals how desperate people are in that they must do anything necessary to survive which allows them to innovate in a way that has yet to be seen on the earth to date.