In the episode, the Sanctuary team investigate an ancient crypt in an island off the Scottish coast and encounter three sisters with abnormal powers.
The team travels to a crypt in an island off the coast of Scotland that Helen Magnus (Amanda Tapping) believes to contain an elixir of life.
They are brought to the Sanctuary for study, where it is later determined that the sisters, Danu (Miranda Frigon), Tatha (Leah Cairns) and Caird (Laura Mennell), have been held in suspended animation for 1,200 years.
In the meantime, a group of Cabal mercenaries have captured several Keepers in Scotland and they release them to the Sanctuary in order to regain what they see as their "property".
During the original writing, director and executive producer Martin Wood brought up the idea of incorporating the Morrígan from Irish mythology into the episode.
The outdoor scene that featured Kandyse McClure was filmed in the same slot as "Sanctuary for All", because Wood wanted to use the present rain.
It was still placed second in the top ten Sci Fi Channel shows the week it aired, behind Ghost Hunters, which received a 2.0 rating.
[6] In the United Kingdom, the episode was seen by 471,000, placing Sanctuary number two in the top ten ITV4 viewings the week it aired, behind a live UEFA Champions League game.
Mell praised the episode for its pace, action, choreographed fight sequences, visual effects and character development, but thought that Magnus and Ashley's relationship was a little forced.
[4] Carma Spence-Pothitt of Airlock Alpha reacted positively to the episode, particularly for its use of celtic mythology, how Damian Kindler and Martin Wood incorporates it into the storyline, and the introduction to the Cabal's.
"[8] Amber Spence of PopSyndicate also reacted positively to the episode, calling it a "much stronger showing than the [somewhat convoluted] premiere," and that the action and pace were well executed to draw in the audience.