Torchwood Archive S-221: The Arsenal (Jack Harkness/Castiel, explicit)
How does one tie up an angel? Jack’s gone above and beyond the call of duty to work out a creative solution. (Explicit, one shot, Jack Harkness/Castiel)

Just another WordPress site
Torchwood Archive S-221: The Arsenal (Jack Harkness/Castiel, explicit)
How does one tie up an angel? Jack’s gone above and beyond the call of duty to work out a creative solution. (Explicit, one shot, Jack Harkness/Castiel)
Quick ficlet for fanwork friday:
Jack stood on the cliff edge and watched the galaxy rise over the perfectly flat lake, reflecting blue and purple and the spread of stars. There was a flutter of wings and he reached automatically for Cas’s hand.
There was hesitation, but Castiel stepped up next to him. Jack could imagine the shadow of his wings covering him, noticing how the breeze lessened. They remained silent as the galaxy ascended, bright enough that the night needed no moon.
Suddenly, the lake began to light up, as if there were new stars being born alongside the reflections. Jack pointed and heard Cas’ breath catch as they watched the lights bloom until the lake was on fire, nearly too bright to look at, washing out the stars above. Instinctively, Castiel turned Jack towards his chest, shielding the human, until the lights began to fade.
When Jack blinked his eyes clear he smiled at Castiel, who was watching the lake with deep concentration.
“They bloom every two hundred years,” said Jack, finally breaking the silence.
“I see why you called me here.” Castiel’s voice was gentle, full of wonder.
Jack softly kissed him. “I figured even angels haven’t seen everything.”
They lapsed into silence again, taking a seat on the cool ground and watching the night pass by.
With someone after Jack, Castiel is determined to keep him safe.
This might well end up being multichapter.
Here’s links to all the fics that I’ve found that feature primarily interactions between Castiel (Supernatural), and Captain Jack Harkness (Doctor Who and Torchwood). I have a few stories in here as well (I’m Cuda). But basically, this is why I ‘ship this ‘ship, and there’s some brilliant gen as well as some fun (and some not so fun) romance.
If you have more stuff with Castiel and Jack interaction as the main focus, send a link my way! I’d love to read more and also update this list.
Genfic
A Personal Angel of Death – Written by Ashes
Warning – mentions of character deaths
Inappropriate Conduct – Written by Cuda
Pre-slash
Recklessness and Water – Written by MoragMacPherson
Slashfic
4173 – Written by janto321 (explicit)
A Moment’s Touch – Written by janto321 (explicit)
A Profound Bond – Written by Jadeykins (explicit)
AU, also includes Dean/Jack, Dean/Castiel, and Castiel/Dean/Jack.Bedroom Hymns – Written by Xenoamorist (explicit)
Christmas Eve 1945 – Written by janto321 (explicit)
Dejame sin aliento – Written by PhoenixSideros
Written in Spanish, also includes Dean/Jack.Fair Fight – Written by Cuda
Ghosts That We Knew – Written by janto321
Grace – Written by Cuda (unfinished, explicit)
Midnight Rodeo – Written by janto321 (explicit)
AU, rodeo-based human universeOf Beginnings and Endings – Written by MoracMacPherson
Warning – mentions of character deathsPlay It Again, Jack – Written by Cuda
Warning – mentions of character deathsSave A Bull, Ride A Cowboy – Written by janto321 (explicit)
AU, rodeo-based human universe, also includes Jack/Sam, Castiel/Dean and Jack/Sam/Castiel.The Splendor of Light – Written by Skidmo
The Tale of the Amorous Vestments or Coat Porn – Written by Synesthete314
That Which Moves in the Dark – Written by Schizzar (explicit)
Also includes Dean/Owen and Sam/Ianto.This Is My Stop – Written by Cuda
Timey-Wimey Voodoo Swing – Written by Cuda
Untitled – Written by tiptoe39
Valentine’s Vignettes – Written by janto321 (explicit)
If anyone is looking for superwood Jack/Cas fics, here you go 😀
I don’t know if I should apologize or rub my hands together in glee 8D. Secret: when I first started shipping them I was only nominally acquainted with Torchwood. This ship is the reason I *watched* Torchwood, and then returned to Doctor Who, which I’d left after SciFi stopped airing it, and finished out NewWho. So I feel that feel.
And I’d never watched Supernatural before I started shipping it (and still haven’t watched all of it). Jazz is awesome like that and the reason I ship it. 😀

And this is the other Valentine’s Day fanwork friday. Jack/Cas, and this one’s a bit more angst, also on AO3
The first time Castiel came for Jack on Valentine’s day it was 2010. They’d worked together a couple times in the year since Ianto’s death, but he wasn’t really looking for anything when the fourteenth of February came around.
But then Castiel was there, appearing literally on his doorstep. Jack stepped back and let him in, going to sit on the scratchy mattress. Castiel sat next to him and merely took his hand. Jack took a ragged breath, leaned on the angel’s shoulder, and for the first time, started to cry.
–
The next time they met up it was 1937. War was on the horizon and Jack was working undercover. He couldn’t really change anything, of course, but there was still work he could do. So he was more than a bit shocked to walk into a tavern in the south of France and find Castiel standing at the bar with two glasses of wine.
Jack gave a tiny smile and took a glass from him. “It is Valentine’s Day, isn’t it?”
“It is.”
Jack raised his glass in a toast. “Come on back to mine tonight?”
He nodded and they drained their glasses and at least for that one night Jack truly had comfort.
–
Early in 2217, Jack was working at a bar on station orbiting a small blue planet when a familiar face walked in. He smiled broadly and poured two glasses of wine for old time’s sake. “Castiel.”
“Jack.” He sipped his wine and Jack could tell the years hadn’t all been easy on him, angel or no. They chatted a bit and that night Jack was the one giving comfort to Castiel.
–
Back to 1974. Jack was spending Valentine’s Night chasing down an alien in the streets of London. He’d narrowly avoided himself a week earlier, but he knew exactly where his current self was spending the night. He cornered it in an alley and prepared to take it, only to be jumped by a second one from behind. He fought them both, but a knife (or was it a claw?) found his heart and they left him dead with the trash.
He gasped awake to Castiel holding his hand. He smiled ruefully. “Happy Valentine’s Day.”
Castiel helped him up, checking him for other wounds, even though there wouldn’t be any. “They have returned to their ship, they will not be a bother to you or anyone else.”
“You took care of them? Thank you.”
Castiel merely inclined his head and helped Jack back to his flat, where he stayed until dawn.
–
In 4207, Jack kicked open a door. The handful of demons turned to the human, one of them scoffing. He fought (perhaps ironically) like a man possesed, not stopping until every one of them was dead. Only then did he move to release their prisoner.
“Knew you’d come,” said Castiel.
Jack kissed him. “Don’t talk, save your strength.” He helped Castiel to his feet, out the door, and into his ship.
Castiel touched his cheek. “By Earth calendars, today is Valentine’s Day.”
“It’s our lucky day,” smiled Jack, kissing his hand and worriedly watching the angel fall asleep.
–
At a Valentine’s Day dance in London, 2003, Jack slowly danced with Castiel. He leaned in and stole a kiss, glad that this was a time and place where he could be himself with Cas.
“I’ll try not to chase any aliens tonight,” he smiled.
Castiel gave him a look. The song ended and Jack took Castiel’s hand, twirling him. They retreated to the side and each took a glass of wine.
“To stolen moments,” said Jack.
“Wherever they might be,” answered Castiel.