Teen Wolf Season 3, Episode 20: Echo House

1

Tattoo

The secret behind Derek's tattoo is revealed and the Alpha pack make their presence known. Derek and Isaac struggle to locate Erica and Boyd.

42 min

2

Chaos Rising

Allison and Lydia locate a possible clue to finding Boyd and Erica while one of Stiles' childhood friends goes missing.

42 min

3

Fireflies

With Boyd and Cora on the loose and under the influence of the full moon, Scott and Derek must turn to an unlikely ally for help.

43 min

4

Unleashed

While Scott tries to keep Isaac from engaging in a deadly confrontation with the Twins in school, Stiles attempts to prove his theory that the killings have nothing to do with werewolves.

42 min

5

Frayed

During a bus ride to a cross country meet, Scott and his friends flash back to the events of a preemptive strike against the Alphas that has left several injured and possibly one or more dead.

41 min

6

Motel California

Stranded at a motel for the night because of the postponed cross country meet, Scott and the others suffer strange experiences that cause them to believe members of their own group may the mysterious killer’s newest targets.

42 min

7

Currents

As the danger begins to reach closer to Scott, threatening his trusted mentor and boss, Deaton, Kali and the Twins go after Derek.

42 min

8

Visionary

Seeking answers, Scott, Allison and Stiles hear stories told by two unlikely narrators and discover a secret about the color of a werewolf’s eyes.

41 min

9

The Girl Who Knew Too Much

As Allison begins to suspect someone dangerously close to her may be involved in the murders, Scott and Stiles conclude that Lydia’s rising talents may be their best bet to solving the murders.

42 min

10

The Overlooked

Trapped inside an evacuated Beacon Hills hospital by a powerful storm, Scott and Derek must defend themselves against the Alphas while trying to figure out how to save Cora’s life.

42 min

11

Alpha Pact

With the threat growing far more personal and time running out on innocent lives, Scott is forced to make a difficult choice in order to save both friends and family while, at the same time, Derek and Peter try to figure out how to save Cora’s life.

42 min

12

Lunar Ellipse

Under Deaton’s advice, Scott and his friends use an ancient but extremely dangerous ritual to help them both save the lives of the people they love and stop Deucalion from achieving his sinister goal.

42 min

13

Anchors

Scott, Stiles and Allison suffer side effects from the ritual sacrifice; Sheriff Stilinski searches through old cases.

42 min

14

More Bad Than Good

Scott and his friends ponder catching the werecoyote before it is hunted down; an unlikely ally helps Derek and Peter break out.

42 min

15

Galvanize

On the night before Halloween, Mischief Night, a convicted murderer brought to Beacon Hills Hospital for surgery escapes, forcing Scott and his friends to step in to help when his unexpected target becomes clear.

42 min

16

Illuminated

Beacon Hills is under curfew from the power outage; the teens throw a blacklight Halloween party; Scott tries to earn Kira's trust.

42 min

17

Silverfinger

Scott's friends pledge to protect him against an increasingly hostile enemy while Argent, Isaac and Allison search for answers through an old adversary from the Japanese Yakuza. At the same time, Stiles enlists Melissa's help in figuring out exactly what's going on with him.

42 min

18

Riddled

Stiles goes missing; Scott and the others set off on a search; Lydia tries to master her new abilities.

42 min

19

Letharia Vulpina

Scott and the others try to prevent a disaster; Lydia and Allison seek out an unlikely teacher.

42 min

20

Echo House

Scott and the others seek an important artifact; Stiles must make a decision about Eichen House.

42 min

21

The Fox and the Wolf

An important clue is revealed in the story of a World War II internment camp; Kira's role is more crucial, and she discovers unusual abilities.

42 min

22

De-Void

Scott and Lydia join forces. Meanwhile, Stilinski faces a review board.

42 min

23

Insatiable

Kira faces an unexpected enemy.

42 min

24

The Divine Move

Scott and Derek call upon their friends and allies to make a last stand.

42 min