V Season 1 Episode 12 (V s01e12) with title ”Red Sky” airs on Tuesday, May 18th 2010 at 10:02 pm via ABC.
Here is summary for V Season 1 Episode 12 :

The episode opens with the V soldier still on the hunt for Val, while for her part, Val’s water breaks and her baby with Ryan will soon be born. Meanwhile Chad, after Father Jack asks him to help get a message on the ship to Joshua, discovers the awful truth that Anna’s been using him.

Few hours after original series aired on TV, online streaming video for V Season 1 Episode 12 usually available on Net and of course, if video available, as soon as possible will show you where you can watch this episode for free.