E1 - The Xindi

Aired: September 10, 2003

Captain Archer and his crew set out to gain information about the mysterious and antagonistic Xindi race.

E2 - Anomaly

Aired: September 17, 2003

Enterprise starts experiencing effects of the spatial distortions pervading the Delphic Expanse, and falls victim to predatory aliens.

E3 - Extinction

Aired: September 24, 2003

On a mission to investigate an abandoned Xindi vessel on a jungle planet, Archer, Reed and Hoshi succumb to a virus that mutates them into a primal life form.

E4 - Rajiin

Aired: October 01, 2003

The NX-01 gets closer to a showdown with the Xindi when Captain Archer takes on an enigmatic passenger: a beautiful slave named Rajiin.

E5 - Impulse

Aired: October 08, 2003

When Enterprise responds to a distress call from a Vulcan ship stranded in the Delphic Expanse, Archer and his boarding team are attacked by insane zombie-like Vulcans.

E6 - Exile

Aired: October 15, 2003

A powerful telepath makes contact with Hoshi and offers to help Enterprise find the Xindi ... for a price.

E7 - The Shipment

Aired: October 29, 2003

Archer, Reed and Major Hayes infiltrate a Xindi-Sloth industrial colony to learn more about the weapon of mass destruction that will be used against Earth.

E8 - Twilight

Aired: November 05, 2003

A spatial distortion leaves Archer unable to form any new long-term memories. Years in the future, he wakes up one morning and is stunned to learn the outcome of the human-Xindi conflict.

E9 - North Star

Aired: November 12, 2003

When a settlement of humans living a 19th-century Western lifestyle is discovered on a Delphic Expanse planet, Archer and crew set out to learn how they got there.

E10 - Similitude

Aired: November 19, 2003

When Trip suffers a catastrophic injury, his only hope for survival is a transplant from a "mimetic symbiont" which Phlox grows from one of his exotic creatures.

E11 - Carpenter Street

Aired: November 26, 2003

Archer and T'Pol travel back in time to 2004 Detroit to stop a Xindi plot.

E12 - Chosen Realm

Aired: January 14, 2004

Religious zealots hijack Enterprise to use it as a weapon against the enemies of their faith.

E13 - Proving Ground

Aired: January 21, 2004

An Andorian ship led by Commander Shran arrives in the Delphic Expanse to help Enterprise hone in on the Xindi super-weapon.

E14 - Stratagem

Aired: February 04, 2004

Archer finds himself face-to-face with Degra, the designer of the Xindi superweapon, and tries to get him to reveal its location.

E15 - Harbinger

Aired: February 11, 2004

As Archer tries to unravel the mystery of a rescued alien, long-simmering feelings explode among his senior officers.

E16 - Doctor's Orders

Aired: February 18, 2004

The fate of Enterprise is in Dr. Phlox's hands as the rest of the crew must be induced into a coma in order to survive a trans-dimensional disturbance.

E17 - Hatchery

Aired: February 25, 2004

Archer goes to extreme lengths to save an abandoned nest of Xindi-Insectoid eggs ready to hatch.

E18 - Azati Prime

Aired: March 03, 2004

Archer sets out on a suicide mission to destroy the Xindi superweapon as Enterprise faces a brutal attack.

E19 - Damage

Aired: April 21, 2004

While dissension among Xindi ranks festers, Enterprise tries to recover from a devastating attack.

E20 - The Forgotten

Aired: April 28, 2004

Two high-ranking Xindi offer to stop the launch of their superweapon if Archer can prove they've been manipulated. Meanwhile, the crew mourns their lost mates.

E21 - E²

Aired: May 05, 2004

An attempt to use a Xindi subspace corridor leads the Enterprise crew to a bizarre encounter with their own descendants.

E22 - The Council

Aired: May 12, 2004

Archer and Hoshi stand before the Xindi Council as T'Pol and Reed lead a team into the heart of a Sphere.

E23 - Countdown

Aired: May 19, 2004

With help from Xindi allies, the Enterprise crew attempts to stop the arming of the Weapon aimed toward Earth.

E24 - Zero Hour

Aired: May 26, 2004

Archer puts his life on the line in a risky gambit to intercept the Xindi superweapon and disarm it from within.