You can get free full episodes from scifi.com which is the network that its airing on in the US. If you click on my link you should be able to see the new episodes. They always have like the 5 latest episodes on there.
I believe those are only available to viewers in the United States, unfortunately. Luckily The channel I watch it on is showing it as it airs for this season, instead of the few months behind it usually is.