A mother thought to be grieving for the loss of her family three years ago becomes a suspect in a CSI investigation.

While Langston testifies in the trial of a respected Congressman, new evidence sends the CSIs back to the lab to reopen the investigation.

A teenage girl dies at a school friend’s party that Grace’s niece was at; Grace has a new partner; Johnny tries to learn more about Earl.

While Dan struggles to save a mother and child in the past, Katie has to deal with her well-meaning sister who wants to help, just as Zack disappears.

Eli goes in for an operation on his aneurysm, but it doesn’t go as planned and Nathan is left with a difficult decision.

Jealousy arises when Sheena’s first love returns to Maltaka to open a long awaited school.

Jealousy arises when Sheena’s first love returns to Maltaka to open a long awaited school.

Donovan puts his resignation from the team on hold in order to help Parker with a rescue operation to maintain peace in Bosnia.

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

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

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.

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

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

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

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

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

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

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

With Galactica on the verge of falling apart, Admiral Adama readies the ship for what could be its final mission, as Baltar’s Six warns that humanity’s final chapter is near.

Adama and the Galactica crew stake the survival of the human race on their plan to rescue Hera from the Cylon colony in this, the series finale.

The Cylons learn that the Final Five are in the Colonial fleet. Some of the Cylons want the Cavil model to stop lobotomizing the Raider ships. Starbuck desperately tries to…

A diamond broker carrying two million dollars in merchandise is murdered after his car is hit by another vehicle and he gets out to confront the driver. The only witness…

Adama and Roslin fight for the hearts and minds of the fleet’s population, as Starbuck finds herself trapped in a supposed resistance hospital.

Sharon helps the Resistance on New Caprica as Adama leads Galactica on a dangerous rescue operation. Tyrol races to save Cally from the execution squad. Meanwhile Anders uncovers treachery among…

Tigh must decide the fate of his wife Ellen after the assistance she rendered to the Cylons. Lee struggles with his assignment to protect the civilian fleet on its journey…

Lingering feelings of rage lead Saul Tigh and Kara Thrace to cause problems aboard Galactica between the survivors from New Caprica and those who stayed with the fleet during the…

Apollo formulates a plan that threatens the very existence of the Cylon culture. Adama and Roslin must decide whether to follow through on the plan to use a biological weapon…

Adama plans to return to New Caprica and drop off a surprising person to act as a liaison between Galactica and the Resistance. Tigh’s insistence on the use of suicide…

Peter faces unexpected consequences for his heroic acts and encounters a reluctant new hero. As Claire continues to adjust to college life, she must figure out how to deal with…

“Strange Attractors” is the sixth episode of the fourth season of the NBC science fiction drama series Heroes and sixty-fifth episode overall. The episode aired on October 26, 2009.

Claire, back home in California, begins attending college, but is having difficulty adjusting when a mysterious death of a student during the orientation puts her back in the spotlight. In…

Claire and her new friend Gretchen investigate the death of Claire’s roommate Annie, while Noah comes to Peter for assistance. Samuel and Edgar recover the compass, Hiro realizes his new…

Two Walkers leave Ojai Foods. While on a dinner with Justin and a fellow soldier, Rebecca begins to question Justin’s sobriety as he does not mention anything about his time…

Allison wrestles with a particularly disturbing dream, all while trying to figure out why a recently paroled convict is so intent on destroying her boss.

A chance to take out a nest of vampires backfires when the alpha-vamp shows up and turns the tables on Mary and the British Men of Letters, who are doing…

Dean becomes suspicious of Samuel’s motives, but Sam isn’t sold on the idea that their grandfather is doing anything wrong. The brothers go along on a hunt with Samuel and…

After a group of young girls go missing Sam and Dean realize that a group of vampires have taken up residence in the small town. After a fight with two…

The doctors of Grey Sloan Memorial Hospital bid an emotional farewell to the beloved Cristina Yang. A possible act of terrorism rocks Seattle and causes chaos at the hospital. Meanwhile,…

A girl’s body is found, burned, in an abandoned basement. Information from the husband of the girl’s best friend points to a Russian, who had tried to date her, but…

A charismatic Jaffa leader seeks to forge an alliance between Earth and his rebel followers, winning the allegiance of Teal’c and Bra’tac.