Tonight, 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…
Source: Gizmodo – The Silliest Life Model Decoy Stories in Marvel Comics History