Season Four Episode Guide

Tempus

Episode #: 401
Air Date: 10.07.11

Magnus goes to 1898 London to try to stop Adam Worth from saving his daughter, which would alter the current time line. (TV Guide)

Uprising

Episode #: 402
Air Date: 10.14.11

Hollow Earth Abnormals amass at the surface with the Lotus Security Forces poised to take action as Magnus' people try to prevent an all-out war between humans and Abnormals. (TV Guide)

Untouchable

Episode #: 403
Air Date: 10.21.11

Magnus must explain a mission that went awry to a UN official as the Sanctuary faces scrutiny following the barely averted Abnormal uprising; Henry's girlfriend turns up with an unforeseen problem. (TV Guide)

Monsoon

Episode #: 404
Air Date: 10.28.11

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. (TV Guide)

Resistance

Episode #: 405
Air Date: 11.04.11

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. (TV Guide)

Homecoming

Episode #: 406
Air Date: 11.11.11

Two flying Abnormals land on the Sanctuary seeking Magnus' help; Will is temporarily blinded during a riot in Monrovia. (TV Guide)

Icebreaker

Episode #: 407
Air Date: 11.18.11

Henry, Declan and a team from the UK Sanctuary go to the Bering Sea to investigate a mystery on a shipwrecked icebreaker, where the crew has killed the Abnormals on board and each other. (TV Guide)

Fugue

Episode #: 408
Air Date: 11.25.11

An Abnormal's attack on Abby leaves her requiring treatment at the Sanctuary while Henry and her FBI partner Gavin retrace her steps to determine what happened. (TV Guide)

Chimera

Episode #: 409
Air Date: 12.02.11

Adam Worth resurfaces as an avatar in a virtual Sanctuary, where he imperils Magnus and Tesla in a bid to enter the real world. (TV Guide)

Acolyte

Episode #: 410
Air Date: 12.09.11

Kate Freelander resurfaces with a warning about a Hollow Earth plot against an above-ground target, and evidence suggests that Bigfoot may be involved in the attack. (TV Guide)

The Depths

Episode #: 411
Air Date: 12.16.11

A quest to capture a legendary Abnormal in Bolivia leaves Will and Magnus injured and trapped in a cave-in, where they confront truths about themselves and their relationship; Henry records video letters to a special someone while working on an invention. (TV Guide)

Sanctuary For None, Part 1

Episode #: 412
Air Date: 12.23.11

Caleb asks Magnus to help broker a peace deal between his insurgents and the governments on the surface; Addison reactivates Will's federal commission; Tesla resurfaces. (TV Guide)

Sanctuary For None, Part 2

Episode #: 413
Air Date: 12.30.11

Henry and Tesla learn that the SCIU weaponized Tesla's work to use against Abnormals; Bigfoot and Kate investigate Caleb's rise to power while Will and Abby look into Magnus' past. (TV Guide)