Lucifer gives Sam a very simple choice as a way of persuading him to become his vessel again. Say yes, save Mary. Set sometime after 12x03, The Foundry. Character death.

Jacob's last goodbye...set BD AU.

An alternate S12 episodes 1 and 2 where Lucifer comes to free Sam from the clutches of the British Men of Letters.

K's fic: The Cage was never meant to hold a human. It was meant for one archangel, not two, and definitely not a human soul. Little by little Sam's soul was being destroyed by the torture the Cage inflicted on it. Lucifer and Michael joined together and, with their combined grace, pieced together Sam Winchester's soul and sent him out of the Cage and into the past...

When Castiel's body starts to give out, Lucifer visits Sam's dreams to get his true vessel back. Both Sam and Dean are breaking down as the hits keep on coming, and to expel Lucifer from Sam's head once and for all, they'll both need to remember who they really are. Hurt/Awesome Sam, Angsty/Protective Dean. Set after "Red Meat." Three-shot.

Ever wondered what happened behind the scenes when Lucifer took over Sam's body in Swan Song? A one shot exploring the fight and interaction between Lucifer and Sam in the midst of the season 5 finale (major spoilers if you haven't seen it!).

Nightmare or flesh, consent or no, the devil was always in his head. The only difference was proximity. / Sam, Lucifer, and a cage. Post-11x09.