Episode 9x01: I Think I'm Gonna Like It Here (Oct/08/2013)
While Sam hangs on the edge of life and death, Dean appeals to the fallen angels for help. Unfortunately, most of them only see Dean as a means to get to Castiel and exact bloody vengeance on the one who caused them to Fall. Meanwhile, Sam wrestles with his inner demons and Castiel learns what it means to be human.
Episode 9x02: Devil May Care (Oct/15/2013)
Dean shocks Sam by popping open the trunk of the Impala and showing him that he has kidnapped Crowley. Kevin freaks out when he sees the King of Hell, but Sam and Dean convince him that they need Crowley to find the demons on Earth. Meanwhile, Abaddon re-emerges and plans to take over Hell.
Episode 9x03: I'm No Angel (Oct/22/2013)
Ezekiel tells Dean a group of angels is hunting Castiel. Dean and Sam race to find their friend before the angels do. Meanwhile, a homeless Castiel is trying to make his way through the city and comes across some unexpected surprises.
Episode 9x04: Slumber Party (Oct/29/2013)
Sam and Dean discover that the table in the Men of Letters house (the one that lit up like a Christmas Tree when the angels fell), has an ancient computer attached to it. They figure if they can get the computer on, they can track the angels. Who better to call for help than the best IT girl there is, Charlie? While moving the massive computer, they dislodge a hidden hexbag that unleashes a magical green-webbed wall. Sam and Dean break through it and discover the one and only Dorothy from Oz. She had trapped herself and the wicked witch in the web years ago to stop the witch from finding the key that would open the gate that connected their world with Oz. With the wall broken, a massive and magical fight ensues that threatens to destroy the Men of Letters house.
Episode 9x05: Dog Dean Afternoon (Nov/05/2013)
While investigating two bizarre murders, Sam and Dean realize there is an eyewitness to both gruesome deaths - a German Sheppard. Anxious to find out if they are dealing with a witch, a skinwalker or other supernatural monster, the guys look up a spell that could let Dean "communicate" with the dog. Unfortunately, the spell comes with side effects that no one saw coming.
Episode 9x06: Heaven Can't Wait (Nov/12/2013)
Castiel gets a job at a Gas-N-Sip and actually starts to enjoy life as a human. A headline in the local newspaper about some disappearances in the area catches his eye, so he calls Dean to help him investigate the case. Dean knows he needs to keep Sam/Ezekiel away from Castiel, so he tells Sam that he and Kevin need to stay and work with Crowley to decipher the tablet. Crowley agrees to help Sam and Kevin but in return he wants one phone call to Hell.
Episode 9x07: Bad Boys (Nov/19/2013)
Sonny, a man who runs a boy's home, calls Dean in after a mysterious death occurs. When Sam wonders how his brother knows Sonny, Dean explains that he spent two months there when he was 16 after being arrested for theft.
Episode 9x08: Rock and a Hard Place (Nov/26/2013)
Sheriff Mills calls Sam and Dean for help investigating multiple murders in her small town. Discovering all four victims belonged to the same church chastity group, Sam and Dean decide to infiltrate by joining the group themselves. When Dean disappears, Sam and Sheriff Mills realize whatever they are hunting has taken Dean too and team up to rescue him.
Episode 9x09: Holy Terror (Dec/03/2013)
After a massive angel slaughter occurs, Sam and Dean arrive at the scene to investigate and are surprised to run into Castiel. While investigating, Castiel is captured and tortured. Meanwhile, Dean questions Ezekiel's demands and wonders if it might be time to tell Sam the truth.
Episode 9x10: Road Trip (Jan/14/2014)
Dean is devastated after Kevin's death and vows to find the angel that killed him, not only to free Sam, but to seek revenge. Castiel arrives at the bunker and suggests they try to separate Sam's brain from the angel's so they can talk to Sam and have him expel Gadreel. However, there's one small problem: the only person who knows how to do that is Crowley.
Episode 9x11: First Born (Jan/21/2014)
Crowley turns to Dean for help to locate the First Blade, the only weapon that can kill Abaddon. However, they soon discover that the trail leads to Cain... the Father of Murder and the most powerful demon of all time. Meanwhile, Sam asks Castiel for help when they need to extract the remaining grace from Sam's body to track Gadreel.
Episode 9x12: Sharp Teeth (Jan/28/2014)
Six months after his disappearance, Garth turns up injured in a hospital. Sam and Dean arrive separately to investigate and soon discover that their friend has undergone a startling transformation... and found others who share his condition.
Episode 9x13: The Purge (Feb/04/2014)
Two victims die and the fat is stolen from their bodies. Dean and Sam investigate a local spa and go undercover, and discover that a monster is preying on the overweight.
Episode 9x14: Captives (Feb/25/2014)
While Sam and Dean try to track down Kevin's mother, Castiel is captured by an old battle-comrade and learns more about the factions of angels.
Episode 9x15: #THINMAN (Mar/04/2014)
The brothers investigate a mysterious murder that was apparently caused by a ghost, and discovers that the Ghostfacers, Ed and Harry, are already on the case. However, the facts don't add up and the Winchesters realize that something more is going on.
Episode 9x16: Blade Runners (Mar/18/2014)
Sam and Dean track down the missing Crowley and discover that he's now thoroughly addicted to human blood. Once they get him sober, the brothers go seeking the First Blade and find it in the possession of a former Man of Letters... who plans to add Dean to his collection.
Episode 9x17: Mother's Little Helper (Mar/25/2014)
When Dean chooses to stay in the bunker and try and locate Abaddon, Sam goes to a small Illinois town to investigate a string of vicious murders committed by seemingly harmless individuals. He's unaware that Dean has actually gone out drinking to deal with the strain of unleashing the Mark of Cain.
Episode 9x18: Meta Fiction (Apr/15/2014)
Metatron attempts to get Castiel to join forces with him. Still furious with Metatron, Castiel refuses, which sets a surprising plan in motion. Meanwhile, Sam and Dean capture Gadreel.
Episode 9x19: Alex Annie Alexis Ann (Apr/22/2014)
Sheriff Jody befriends a young girl on the run from vampires. When she's forced to kill one of the monsters, Jody calls in Sam and Dean for help. However, they discover that everything isn't at it seems when the girl wants to go back to the vampires.
Episode 9x20: Bloodlines (Apr/29/2014)
Sam and Dean learn about a monster killing in Chicago and head there to investigate. What they find is a young cop whose girlfriend was killed by the same creature, and who is caught between five powerful clans of monsters who jointly control the city. However, war is about to break out and the sides are drawn as the Winchesters discover that the original victim belonged to one of the clans.
Episode 9x21: King of the Damned (May/06/2014)
Abaddon finally gets something that she can use as leverage against Crowley to force him to lure the Winchesters. Meanwhile, Castiel rallies his forces and asks Sam and Dean to come in and help him interrogate a captive angel with ties to Metatron.
Episode 9x22: Stairway to Heaven (May/13/2014)
After a massive attack on the angels, Castiel (calls Sam and Dean for help. As they leave, Dean's eagerness to bring the First Blade doesn't go unnoticed by Sam who is worried about the cost to his brother whenever he uses the Blade. Meanwhile, Castiel is shocked when he learns the angel that caused the attack was one of his followers and did it in his name. Dean discovers there is a conspiracy amongst Castiel's angel followers and at the heart of it is Tessa, the Reaper.
Episode 9x23: Do You Believe in Miracles (May/20/2014)
Dean feels the effects of the First Blade, and Metatron makes his move against humanity. Meanwhile, Sam, Dean and Castiel face shocking consequences when taking the fight to Metatron.
Source: TVRage