After a break, Agents of SHIELD returns to TV with a whole half-season saga centered a long-time staple of SHIELD -- the Life Model Decoy, or LMD, a sentient android doppleganger indistinguishable from an actual human being.

LMDs have long been one of the most used and abused concepts in Marvel Comics, thanks almost entirely to Nick Fury. Here's hoping Agents of SHIELD doesn't pull anything as ridiculous as these stories.