I have been watching this show since season one. So of course, I am going to have some favorite episodes. I like all of them, so it was kind of hard to narrow it down. But I picked a few of my favorites along with some quotes that I really love.
Season One
"The Wendigo": Piper is attacked by a beast. She ended up turning into a Wendigo; it was somewhat like a werewolf. Prue and Phoebe had to find a way to save Piper and the only way to save her was to kill the one who attacked her.
Is There a Woogy in the House?: An earthquake unleashes the nexus in the basement. Phoebe is taken over by the nexus, which is trying to take control of the house. Phoebe locks Prue and Piper out after a very important dinner party for Prue's job. The house itself wouldn't let them back in. Prue and Piper had to figure out what had the house and what had Phoebe.
Which Prue Is It, Anyway?: Prue casts a spell to multiply her powers times three so that she could be strong enough to separate a powerful warlock from his sword. Unfortunately, the spell didn't multiply her powers. It multiplied her! There were three Prues. There was the original Prue, a very cheery, chipper Prue, and a seductive, kinda slutty Prue. They all had to find a way to use the "Power of Five" to defeat the warlock.
Out of Sight: Two Grimlocks (demons that see the aura around people and use it to suffocate them) are stealing the eyesight of children. The sisters must go underground to save the children that have been kidnapped by the Grimlocks. After Piper is hurt, Phoebe and Prue must use the potion to kill the Grimlocks and save Piper. In this episode Prue learns to channel her powers through her hands and Andy finds out about the sisters secret.
Season Two
A Painted World: Prue gets sucked into a painting as she is trying to free the person that was already in the painting, who turns out to be a warlock. Meanwhile, Phoebe casts a smart spell to help her get a job. After Piper gets sucked into the painting too, Phoebe has to use her super brain power to free her sisters and destroy the warlocks that lured them there.
They're Everywhere: Prue and Piper cast a spell to hear people's thoughts after suspecting that Jack and Dan are warlocks. By hearing their thoughts, they try to determine whether they are warlocks or not. Meanwhile, two demons are after a young man who uncovered a very powerful source of ancient knowledge. The sisters have to find a way to straighten out their personal lives and their wiccan lives.
Awakened: Piper contracts a life-threatening tropical virus that leaves her in intensive care and on the brink of death. To try to save her life, Prue and Phoebe cast an 'awakening' spell, however, since the spell was used for personal gain, the sisters can no longer sleep, and Piper's sickness spreads into an epidemic as a direct consequence. They must reverse the spell, even though they may lose Piper.
Chick Flick: The sisters track a demon who is causing violence through movies. After Phoebe's favorite character Billy is brought off of the screen, the demon sends horror movie villans after the sisters.
Season Three
Primrose Empath: Prue, after helping who she thought was a shut-in, becomes an empath. The person who she helped was actually a demon who was curse with empathy to contain him. Prue was not meant to have this power and it begins to take over her. With Prue going insane, Piper and Phoebe are unable to stop the demon. It's up to Prue to find a way to channel what she's feeling to stop the demon.
Coyote Piper: Piper is possessed by an evil essence. After getting the Charmed Ones to kill her creator, the Alchemist, the essence takes Piper's body for a joy ride at her high school reunion. Meanwhile, Piper is slowly dying. Prue and Phoebe find out about the essence and try to stop her. However, to get it out of Piper, they have to kill her.
Blinded by Whitelighter: A warlock named Eames is killing off witches to complete his evil plan. Leo's fellow whitelighter, Natalie, steps in and takes over Leo's job as whitelighter to the sisters. She puts the sisters through wiccan boot camp to prepare them to vanquish Eames. After Natalie's plan falls through, the sisters have to break some rules to save good witches everywhere.
Sin Francisco: The sisters are infected with sin by a warlock. Prue is infected with Pride, Piper with Gluttony, Phoebe with Lust, and Leo with Sloth. The sisters must overcome their sins before they end up taking over them.
Season Four
A Paige From the Past: Paige, feeling responsible for her parent's death, goes back in time to find out what really happened the day her parents died. Leo goes as Paige's guide, which leaves Piper at home with Phoebe and Cole who have been possessed with the spirits of two criminals, Franky and Lulu. The two have some unfinished business that leads them the altar.
Lost and Bound: Wanting to protect a ten-year-old orphaned boy who is a firestarter, Piper and Leo try to hunt down the demon before he can deliver the kid to The Source. Meanwhile, Phoebe is given Gram's wedding ring by Cole, but to their surprise the ring has been cursed to transform the wearer into a traditional 1950's suburban housewife.
Charmed and Dangerous: The Source breaks an age-old agreement between good and evil by stealing The Hollow, an ancient vapor which he uses to absorb first Piper's and then Paige's powers. Phoebe must allow Cole to help The Charmed Ones in spite of having had a premonition that involved Cole sacrificing his life to save her from evil. But there may be more to the premonition Phoebe just can't see.
Long Live the Queen: Phoebe takes up the role as Queen of the Underworld. Piper is feeling like a failure because she feels as though it is her fault Phoebe turned evil. Phoebe receives a premonition and helps her sisters save the innocent. Piper tells her that she has to choose a side, while Cole says the same thing regarding her wiccan duties. Unable to choose, the choice is forced upon her when Cole kills the innocent and Piper and Paige comes after him. She must choose: Cole or her sisters.
Season Five
Sand Francisco Dreamin: A demon attacks The Charmed Ones with dream dust, causing their nightmares to come to life. Paige is harassed by an evil clown at a baby shower, Piper has an affair and Phoebe is chased by a maniac with a chainsaw. The sisters must use magic to put themselves to sleep to re-enter their nightmares and unmask the symbolic meaning of their dreams.
Special Delivery: Phoebe and Paige go to a summit meeting with the leaders of evil and discover that all magic - both good and bad - has disappeared enabling the leaders to steal Piper's about-to-be-born baby and welcome the twice-blessed child into the kingdom of evil.
Cat House: When Piper and Leo begin to have marital problems, Piper casts a spell to allow them to literally see their past together. However, the spell goes wrong when Phoebe and Paige are sent back in time to relive Piper's memories, and a warlock bent on destroying the Charmed One's familiar, Kit, is tagging along for the ride.
Sense and Sense Ability: In order to get close to baby Wyatt, a demon named the Crone steals one of the senses from each of The Charmed Ones, fooling the Wyatt with Paige's voice, Phoebe's hearing and Piper's sight. Meanwhile, the sisters have to learn how to use their other senses to take on a Kazi demon.
Season Six
Charmed in Camelot: The Charmed Ones are called upon by The Lady of the Lake to help protect Excalibur, the legendary Sword in the Stone. Meanwhile, numerous magical beings arrive at the manor to try their hand at pulling the sword from the stone, but it's Piper who finally pulls Excalibur out of the stone, causing a man to appear. He tells Piper that she is now the Queen of Camelot. However, the sword actually ends up belonging to baby Wyatt.
Prince Charmed: After Piper vanquishes a demon from Wyatt's room, she has an epiphany about the rest of her life concerning Wyatt. Unable to handle's Piper's revelation, Paige and Phoebe decide to remind Piper of the importance of love by conjuring up a "Mr. Right" as Piper's birthday present. Meanwhile, Chris convinces the sisters to bind Wyatt's powers. Unfortunately, a demonic cult members kidnaps Wyatt and turns him evil. Chris finally reveals that he isn't a whitelighter, but he's a whitelighter-witch, like Paige and Wyatt.
I Dream of Phoebe: Phoebe frees a genie, Jinny, from a bottle, only to find that she has been tricked into becoming the genie herself. Anxious to put Leo and Piper back together so he can be conceived, Chris uses Phoebe to make his wish come true, but she takes his instructions too literally. Feeling that he is losing Paige, Richard steals the bottle so he can wish Paige back into his life. Amid all of the wishing, Jinny regains the bottle and wishes the Charmed Ones dead. Now they must find a way to reverse what the genie bottle has done before it's too late.
Spin City: Aware that the sisters are on the verge of discovering that he is after Wyatt, Gideon conspires with two demons to make the girls part of "Witch Wars," a new demonic reality television show where demon contestants compete in a series of contests to hunt down the Charmed Ones, with the winning demon acquiring the witches' powers. Meanwhile, Chris informs the sisters that whoever is after Wyatt will get to him before Chris is born.