This was a terrific final episode to bring series 2 to a close and answered so many questions, while whetting the appetite for more information about the final episode was brilliantly paced and all edge of the seat stuff. The apparent failure of the research facility was a surprise, and in part explained the disappearance of the black-op soldiers from the series.
The final admission by Landry as to the source of the pandemic, was shocking, but in part hinted at earlier in the episode and certainly will be familiar to anyone who has followed the conspiracy theories surrounding the source of HIV and Ebola.
All in all I have been thoroughly impressed by this series, and hope that there will be a Series 3. But as a few years have already passed since series 2, its highly unlikely. Another great series that was not given enough opportunity to flourish! Pity!