A time-traveling TV series ~
TV series that traveled through time and space usually depicted the protagonist returning to the past in some way to change the course of history. The common plots of this type of TV series were: The protagonist travels back in time and tries to prevent a historical event from happening or change the direction of history. The protagonist travels back in time and meets a historical figure to start a legendary story. The protagonist travels back in time and tries to save a certain character to change the course of history and save the whole world. TV series that traveled through time and space usually involved scientific concepts such as relativity and quantum mechanics. At the same time, this type of TV series often had some mysterious elements such as time vortexes, space-time tunnels, and so on. TV series that traveled through time and space often resonated with the audience because they could let the audience feel the difficulties and challenges brought by time travel, and at the same time, they could let the audience feel the charm and complexity of history.