The sisters must find a demon responsible for the murder of one of Phoebe's classmates. Meanwhile, Dan discovers that Leo was previously married, and decides to take matters into his own hands, while Prue attempts to help a man who is looking for a witness to his daughter's murder.
Maldus returns to torment the crew, convincing them that their friends have perished. One by one, the evil sorcerer drags them into his realm.
A warlock brings characters to life from old B-grade horror movies in an attempt to kill the Charmed Ones.
When Rob and Ellen ask Will and Grace to be the best man and maid of honor at their wedding, Grace's sexy past with the groom is exposed when Ellen learns at her bachelorette party that Grace once slept with Rob. Meanwhile, Jack is confused by his reaction to the entertainment at Rob's bachelor party.
A datacam tape is uncovered showing Aeryn as part of a Peacekeeper firing squad that executed a previous Pilot aboard Moya. The rest of the crew wants answers but Aeryn is recalcitrant about revisiting her past – especially her relationship with Velorek, the man charged with forcibly bonding a new Pilot to Moya. Pilot two refuses to communicate with the crew, not wanting to reveal his own complicity in the murky circumstances surrounding his installment as Moya's guide.
The crew returns from a Commerce Planet with a load of Crackers and a meek alien called Traltixx, who promises he can alter Moya's electromagnetics to make her untraceable. Crichton is skeptical; it seems too good to be true. As they pass through a constellation of pulsars, an intense paranoia affects the crew, turning them violently again each other. Crichton must fight against his own paranoid delusions to work out what Traltixx is actually doing and how to stop him.
A group of three elderly witches, one of them close friends of the Halliwells' grandmother, summon a demon to restore their youth. However, in return, the demon wants the powers of the Charmed Ones.
After winning concert tickets from a radio contest, Grace vows to get more involved and she volunteers herself and Will to help out at the community center. Unfortunately, her charitable work conficts with the concert. Meanwhile, while collecting clothes to give to the mission, Jack donates a pair of Karen's most-prized shoes.
Chiana leaves Moya and goes to 'grave planet' populated by reckless thrill seekers who play dangerous and life threatening games.
After Prue prevents a woman from committing suicide, a Darklighter puts a curse on her that throws her into a depression that could cost her life.