Season Four of Sanctuary is set to premiere on October 7th, 2011 on Syfy in the US and SPACE in Canada, and some time later in the United Kingdom on WATCH and on SciFi in Australia.
In describing what the fourth season would be about, Amanda Tapping stated that the Hollow Earth storyline would still be dealt with. She also requested that Magnus be given a love interest. At San Diego Comic-Con, Amanda Tapping and Robin Dunne stated that season four will contain a musical episode called 'Fugue'.
Starting with this season, the episodes are split into six "acts" instead of four, to affort an additional commercial break. Months after the fourth season ended, Syfy announced on May 21, 2012 that Sanctuary will not be returning for a fifth season and that the show is cancelled.
Syfy cancels Sanctuary.
A hostage situation unfolds when Magnus flies to a remote island off of Africa to meet the Sanctuary's new financial adviser; a shipping container mix up has Will and Henry tracking a missing abnormal.
The team tracks an Abnormal fugitive, and discovers that Tesla is the head of a secret research lab for a Homeland Security agency that conducts tests on Abnormals.
Will runs into unexpected trouble, and personal revelations, on a trip to the Liberian Sanctuary in Monrovia. Meanwhile, Magnus has her hands full when a couple of never-do-well abnormals recruit her help with a questionable scheme.
When a team from the UK Sanctuary gets in trouble on a stranded icebreaker in the Bering Sea, Magnus and Will must figure out who is behind the mysterious happenings at sea.
After Magnus has announced the existence of abnormals to the world, her great plan is set into motion. Meanwhile, Tesla realizes he may have handed SCIU the means to build a doomsday weapon.