A/N: Welcome to the third book of this series! Because this is a trilogy, I wanted to first post a recap of the other two books before we hit the ground running. Consider this a sort of prologue ;)
The Road So Far
Episode One: Stranger
The Doctor and Martha meet a very sick eight-year-old Dean Winchester when he's trying to buy himself some medicine. But when a ghost shows up at the grocery store, Dean takes the lead and the Doctor has to face the facts that the supernatural might very well be real.
Episode Two: Introduction
When kids are going missing, the Doctor and Rose step up to investigate. When their investigation collides with Dean's the Doctor meets the Winchesters for the first time, and the only thing that makes him trust Dean is Rose's assertion that she's already met him.
Episode Three: Ape
As a treat after their hunt, the Doctor takes the Winchesters on a field trip. Unfortunately, that field trip leads them right into some Silurians, and Dean manages to get himself captured almost as soon as they land.
Episode Four: Angels
When the Doctor finds Dean hunting weeping angels, he's determined to keep his friend safe. But when Donna is sent back in time and the sun goes down, the two of them have to figure out a plan before they lose the light.
Episode Five: Mary
Donna is stuck in the 1970s, and she doesn't like it. When the Doctor and Dean go after her, though, they find more than they bargained for in Lawrence, Kansas, back before Mary died. The Doctor (and others) must keep Dean from trying to change his past.
Episode Six: Trust
Jack, Rose, and the Doctor just wanted a nice day out, but when they investigate some cries for help, Jack and Rose find themselves tied up and waiting to be sacrificed. When Dean and Sam track them down, they must first convince Rose and Jack that they're here to help.
Episode Seven: Alone
Sam's gone, Dad's a mess, so when Dean gets a call from his old friend Jack, of course he's willing to help. He just wasn't expecting to be vortex-ed ten years into the future into the headquarters of Torchwood!
Episode Eight: Water
Martha and the Doctor just want a nice relaxing day at the beach. The Winchester brother have the same idea. But when first Martha and then Dean go missing, it's up to the Doctor and Sam to rescue them before it's too late.
Episode Nine: Pilot
The Doctor is in a bad place, and River has asked the TARDIS to take them somewhere to cheer him up. So, the TARDIS takes them to Dean in New Orleans working a case on his own: a voodoo case that has already claimed another hunter's life.
Episode Ten: Trust Nobody
The Doctor and Rose are pretty much inseparable. So in a town of replacement lookalikes, you can better the Doctor knows which one is the real Rose. The real problem is finding her—with the help of the Winchesters, of course.
Episode Eleven: Dead Space
River seeks out Dean so she can let off some steam while she's hunting, and Dean, fresh off of his dad telling him to kill Sam, is more than happy to take her up on it. Throw in the Ponds dealing with the Doctor's death, and you've got a whole lot of emotionally unstable adventurers!
Episode Twelve: Steal Heart
The Ponds, the Winchesters, and the Doctor and River are trapped in space with the Cybermen, who have also, incidentally, captured Dean. This is not quite the way they'd all hoped to blow off steam.
Episode Thirteen: Midnight Run
Shortly after the Doctor had his voice stolen by the creature on the planet Midnight, Donna and the Doctor find the Winchester brothers on a windigo hunt. As far as cheering the Doctor up, it's not quite what Donna had in mind.
Episode Fourteen: Terror Trap
The Doctor and Clara run into the Winchester brothers investigating a haunted house. Clara is understandably wary of Dean, who was demonic the last time she saw him. Oh, and the haunted house? Might me more than just haunted.
Episode Fifteen: Extermination Omen
The Doctor and Martha meet up with the Winchesters on what they think is a ghost hunt. But when it turns out that Daleks are involved, you can throw all bets out the window.
Episode Sixteen: Dalek Deal
Dean's gone, Sam's being attacked by a hell hound, and the Doctor is being forced to help a Dalek. Yeah, things don't look so good.
Episode Seventeen: Time Eaters
With the Dalek taken care of, the Doctor, Martha, and Sam can now go in search of Dean—who, it turns out, has been hanging out with a much, much younger version of the Doctor, along with Jamie and the Brigadier.
Episode Eighteen: Ghost Story
Dean is dying, and he knows it. So a few last hurrahs won't hurt anyone, right? Yeah, that's what he thought—until the Doctor and Donna show up and problems from his past and his future collide.