A good punchy opening gives way to a drawn out series of dull conversational confrontations that finish with a predictable albeit logical ending.
It fails from the beginning as the situation isn't really made clear and the story isn't framed enough.
Clever use of special effects frame the timelime as somewhere in a mid-term future. This quickly gives way to a series of repetitional confrontations between the two main characters of the story. I found these to be dull and uninspiring. The drama is conveyed through the adverseral situation and dialogue between these two. Unfortunately it is such a letdown, it never allows the episode to recover from the initial middle act which I found to be confusing at first and then cliche. As the story is revealed from the lost memories of Watermans' character and the physchiatrists interrogatory questioning, That said the screenplay does hint at the gem of a troubling story that it is based upon. While neither of the main actors really convinces you of the serious nature of their plight, there is something here to at least satisfying in the latter half of the show.
Fortunately in the UK this was not shown first, and probably a good choice to as it isnt the best episode in this intentionly short season. Its episodes like this that keeps SF from returning to mainstream TV.