Continuum is one of those "what if" stories that plays with the ideas of time travel and alternate realities. In the show Kiera, a police office, travels back in time and attempts to thwart a terrorist plot and preserve the future that she knows, so that she can go back home to her son. It is interesting, because it allows for the possibility of 2-way time travel, when most stories that play around with the idea think if it as being one way. It is a great show to watch if you are into Sci-Fi. We watched all 4 seasons, and it wraps up neatly at the end.