Parasite

by FudoTwin17

When the Doctor and Donna discover that the powerful Merlin is being held a slave, they are on the clock to save him before it's too late. Of course, this means going through time and space to find the reincarnations of the heroes and villains of Camelot - and convincing them that neither Donna nor the Doctor are crazy.

They don't have time to waste, and if they fail, the monster that repeats, repeats, repeats gets Merlin.

Words: 2300, Chapters: 1/?, Language: English

• Fandoms: Doctor Who (2005), Doctor Who, Merlin (TV)
• Rating: Teen And Up Audiences
• Warnings: Graphic Depictions Of Violence, Major Character Death
• Categories: F/M, Gen
• Characters: Merlin (Merlin), Arthur Pendragon (Merlin), Gwen (Merlin), Morgana (Merlin), Gwaine (Merlin), Percival (Merlin), Elyan (Merlin), Lancelot (Merlin), Leon (Merlin), Mordred (Merlin), Tenth Doctor, Donna Noble, Rose Tyler, Jethro Cane
• Relationships: Merlin/Morgana (Merlin), Gwen/Arthur Pendragon (Merlin), Guinevere/Arthur Pendragon, Guinevere/Lancelot du Lac, Tenth Doctor/Rose Tyler
• Additional Tags: Reincarnation, Complicated Plots, Complicated Relationships, Not Canon Compliant, Freaking Creepy Monsters, Slavery, Mental Breakdown, Mind Control, Guilt, Mental Health Issues, Mental Instability, Mentioned Spoiler for Jurassic Park