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"Malleus Malifecarum"

Sam and Dean travel to Sturbridge, Massachusetts, and discover a coven of witches that has killed two people. These witches uses some ritual in killing. Ruby warns the brothers to stay away as the demon controlling these witches is very powerful and will surely kill them. Ignoring her plea, Sam and Dean go in after the coven and confront the head witch, who reveals Ruby’s past. As they go on, Dean now becomes the victim and then on Sam rushes to the witches to save Dean. They were able to stop the Demon using the knife from Ruby. At the last part of it, Ruby and Dean had a conversation, telling Dean that Ruby can’t save his life from the crossroad deal he had.

"A Very Supernatural Christmas" 

It’s Christmas time and Sam and Dean investigate a series of murders where the victims were pulled up through the chimney. Sam realizes they are dealing with a sort of Anti-Santa, a demon with roots in pagan lore. They’ve manage to identify the killers but when they went to the house, they ended becoming the next victim of the ritual but they were able to escape and killed the demons.

Dean wants to celebrate Christmas the old fashioned way as this is his last, but Sam refuses, not wanting to accept that Dean won’t be around next year. But after solving the case, Sam than changed his mind and celebrated it with Dean they had some beers and exchanged gifts. Sam flashes back to a certain Christmas when he waited for his father to come home to give him a special gift.

"Fresh Blood"

Sam and Dean capture a female vampire named Lucy who claims to have no knowledge of how she became a vampire, the brothers have nothing else to do but to end the life of the poor victim. The guys discover Dixon, a male vampire, is giving out human blood to unsuspecting females in bars, offering it up as the "latest drug" and turning them all into vampires.

Meanwhile, Gordon escapes from jail and goes after Sam. However, Dixon intercepts Gordon and turns him into a vampire, which makes Gordon more powerful than before and a much bigger threat to Sam. When he visits his partner, he ends up killing him because his partner wants him dead because Gordon now is dangerous to the society. Gordon lured the brothers in a vacant house and trapped Sam inside and Dean left outside, but the brothers still killed Gordon even with his super-strength.

"Red Sky at Morning" 

Sam and Dean investigate the mysterious demise of drowned victims who were nowhere near the water at the time of their death.The brothers learn each of the victims saw a ghost ship shortly before they died. The history of the killer is that he was killed in this ship by the captain, he’s own brother. Now the ship is appearing to a specific target, the people who spill their own families blood.

Upon investigation, they cross paths with Bela, who is being paid handsomely by one of the murder victim’s family members to solve the case. Sam and Dean warn her to stay out of their way, but she has other plans.

"Bedtime Stories"

Sam and Dean investigate a small town that has been plagued by a number of strange murders that resemble fairy tales, such as Little Red Riding Hood, Snow White and Hansel and Gretel. This was the Doctors daughter who was in coma for how many years. The kid just want to communicate with his father. The case was closed when Sam said that talking to the kid and telling her to stop was the answer to their problem. After that her duaghter in coma died.

Meanwhile, Sam summons the Crossroad Demon and threatens to kill her with the newly rebuilt Colt unless she releases Dean from his deal. Sam shot her but nothing change. There is another Demon who is holding the deals in the hell.

"Sin City"

At the begginine of the episode was a man commiting suicide infront of a Priest in a church.And this  caught the brothers attention. Sam and Dean investigate a rash of violent deaths in Elizabethville, Ohio, a once-sleepy town that has been turned into a haven for gamblers and drinkers.

Dean discovers demons have infiltrated Elizabethville and are using their powers of persuasion to make the townspeople succumb to their basic instincts. Meanwhile, Ruby helps Bobby rebuild the Colt from scratch and stuns him with some news. The gun then was tested when they killed the Priest and the bartender who were possesed by the Demons and lovers for centuries.

"Bad Day at Black Rock" 

Sam and Dean answer a call on their dad’s old cell phone, alerting them someone has broken into John’s secret storage room in New York. They discover a cursed rabbit’s foot has been stolen and call Bobby for help. They manage it to get it from the robbers, but they didn’t not what that rabbit’s foot all about.

Bobby then advises them to beware of the foot because anyone who touches it will receive an extreme amount of good luck, but once the foot is lost that person will die. Unfortunately, Sam has already handled the foot, which causes an overjoyed Dean to buy lottery tickets, but a female thief (Bella) steals it from Sam causing his luck to plummet and putting his life in danger. After all the bad luck that the rabbit’s foot has gotten Sam, they were able to destroy it by burning it using specific materials and rituals.

"The Kids are Alright"

Dean pressures Sam into visiting Cicero, Indiana, so he can visit an old flame named Lisa, he had a tryst nine years ago. However, Dean is stunned when he meets not only Lisa again, but also her 8-year old son Ben, who bears a striking resemblance to him. But in the end the kid is not from Dean. Lisa told him that she met another guy after Dean with the same as him.

However, Ben soon goes missing and Sam and Dean discover that a Changeling, a demonic parasite, is snatching kids from the small town and assuming their form. Meanwhile, Ruby makes contact with Sam and reveals some startling information about his mom.

"The Magnificent Seven"

Bracing themselves for the possibility of an apocalyptic war, Sam and Dean realize they have an enormous task of hunting down the hundreds of demons that escaped from the Devil’s Gate.

With only a year left to live, Dean decides to live life to the fullest and exhibits a carefree attitude that troubles Sam, who is trying to find a loophole in the deal. Bobby tells the brothers about a sighting in Nebraska that turns out to be seven demons that are the actual manifestations of the Seven Deadly Sins. They’ve managed to lure the Seven in a house, they’ve killed them one by one but Sam had three on him and suddenly a blonde girl help him and killed the three Demons by a knife. The brothers and Bobby now is had the same question in their mind of who that blonde girl is.

In Season 1, two brothers, Sam and Dean Winchester, witness their mother’s paranormal death as children and grow up trained to fight by a distraught father who wants nothing more than to hunt down the thing that killed his wife. Sam escapes to college to start a new, normal life, but gets pulled back in after Dean shows up on his doorstep to tell him their father is missing. The following episodes was all about searching for their father and they’ve believed that searching their father will lead them to the thing that killed their mother.

In Season 2, The episodes are all about the search for the Devil. At the start they failed to kill the Devil and instead their father leave him no choice but to engage in a deal with the "yellow eyed Devil" because Dean is about to die. The Season was also all about Sam who is figuring out what are the plans of the Devil for him. This time Dean sacrificed his self, sold his soul for Sam. Sam here was ones dead but revive through the "crossroad deal" by Dean and now he has 1 year left to live. In here they were able to kill the Devil but they were not successful in not letting the Hell’s Gate open. Hundreds of Demons are on earth now and its up to them to take them all.

Now I will take to each episode of Season 3. New characters are added and war is waiting for the Winchester brothers. In here Sam will try to search to break the deal and give Dean more years in his life but the conditions of the deal is making it hard because when they try to do anything about it, Sam will die.