Of Fang and Metal » by falconstar100 reviews
A discovery in the woods causes Hiccup and Toothless to meet an ally and be caught up in a adventure to save their island, and possibly, their planet, from their new friend's deadly foe. Post-movie. Contains spoilers.
Crossover - Doctor Who & How to Train Your Dragon - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 4 - Words: 4,762 - Reviews: 14 - Updated: 6-2-10 - Published: 5-3-10

My comment: Hiccup knows what a planet really is. Hiccup. Knows. What. A. Planet. Really. Is.