0-8-4 (Code)

"I don't even know where we are going." "Peru. That's where the 0-8-4 was reported." "And an 0-8-4 is?" "Object of unknown origin, kind of like you. Team goes in, determines if it's useful or poses a threat. Last one turned out to be pretty interesting." "What was the last one?" "A hammer."

- Skye and Phil Coulson

An 0-8-4 is an object of unknown origin detected by S.H.I.E.L.D. A small band of agents are sent to determine whether an 0-8-4 is a weapon or practical technoloy.

Known 0-8-4's

 * Mjølnir
 * Unnamed HYDRA weapon