After the destruction of Bobby's place by the leviathan Edgar; Bobby, Sam and Dean use a cabin in Whitefish, Montana that belonged to Rufus Turner as their base. Bobby states that Rufus hadn't used it in a number of years.
The main part of the cabin is an open plan area containing a kitchen area, table and chairs and sofa and television. At one end a couple of steps lead to an area with a fire place against the middle back wall, surmounted by the Deer's Head and flanked by a camp bed on one side and a bunk on the other. There is also a basement which looks like a sex torture dungeon. 
Dean and Sam return to Rufus's old cabin in Whitefish, Montana, with Chet. Bobby chains him in the basement and through trial and error tries to find out how to harm or kill leviathans, with little success.
After Sam and Dean leave to hunt down their leviathan doppelgangers, Sheriff Jody Mills arrives to thank Bobby for saving her from the leviathans, and offers her condolences for the loss of his home. Bobby continues working on Chet in the basement, when something drips down from the floor above, burning the leviathan. Bobby finds Jody cleaning a spill with a borax-based cleaning solution - and kisses her in delight.
The week of Bobby's death, the brothers relocate to the cabin, in shock. Days pass, during which Dean fills the cabin with notes on the numbers Bobby provided just before his death. Three weeks later, the brothers are still at the cabin, until Sam answers a call on Bobby's old cellphone from Krissy Chambers.
Dean stops at the cabin and makes phone calls as he tries to find a way to help Sam.
At the cabin, Bobby's ghost explains Dick Roman's plan to cure humanity of diseases, and then use them for food. When the boys are alerted to the fact that Frank Devereaux's hard drive has been stolen, they leave to investigate.
After the angels locate Castiel and the Word of God, Sam and Dean take Cas, Meg and the keeper of the word Kevin Tran, back to the cabin. Sam covers the cabin in sigils to hide them from the angels. Dean takes Kevin to the basement to translate the Word, although Kevin is rather suspicious about the basement, asking Dean: "Is this a sex torture dungeon?"
After Meg kills some demons nearby, it allows the angels to locate the cabin. Hester attacks Cas, but Meg kills her. The angel Inias then agrees that the angels will return Kevin home and watch over him.
Sam and Dean are at the cabin trying to work out how to best use Kevin's translation of the Word of God. Bobby manifests to Dean while he is in the bathroom, demanding they take action. They summon Crowley who agrees to give his blood for the weapon to use against Dick - but not yet. He gives them the location of the Alpha Vampire by burning it into the table top.
Castiel returns to the cabin, bringing Meg along with him. Crowley appears and informs Sam and Dean he will help them. Castiel is adamant that he will not be involved in any fighting, although Crowley indicates he will be integral to defeating the Leviathans.
After returning from Normandy with a sandwich he made himself for Dean and Sam, Castiel also does the dishes.
It is in the basement of the cabin that, at his request, the boys destroy Bobby's flask in order to send Bobby's ghost from the world.
When Dean returns from Purgatory, he and Sam reunite at the cabin. There Dean learns that Sam has given up hunting and that Kevin has escaped Crowley from the messages he left on one of Sam's phones that he abandoned. After determining Kevin's probable location, the two set out to find him.
On his way back to the cabin with supplies, Dean sees Castiel.
At the cabin, Sam tells Dean about a new case he has discovered: unconnected people going missing with wacky weather following which they believe are demon signs.
Suspicious of Castiel's behavior, Sam and Dean return to the cabin and cover it in Enochian sigils that block all angels including Castiel from being able to see or hear them as they discuss how weird Castiel acted and the theory that he is possibly being controlled by someone they don't know. Sam goes off for a walk after deciding not to go back to Amelia and Dean calls Benny to tell him that their relationship is over. Later, Sam and Dean watch TV together as they drink beers.