Throughout the fourth season of Agents of S.H.I.E.L.D., it re-introduced a Marvel character in the form of Ghost Rider. In the show's eighth and final episode for the season, it ends the "Ghost Rider" arc while setting the stage for Coulson and Co.'s next adversary.

The episode, entitled "Law of Inferno Dynamics", deals with Eli Morrow's master plan of wiping out the Earth and rebuilding it to his liking. Fortunately, S.H.I.E.L.D., led by Agent Coulson, together with Robbie Reyes, the latest incarnation of "Ghost Rider" that the series adapted, does their best to stop this sinister plan.

According to Entertainment Weekly, it is revealed that the source of his power is from another dimension, Eli (Jose Zuniga), Robbie (Gabriel Luna) and Eli's bomb gets sucked by a Darkhold-powered instrument to bring the villain into the same place where his powers are coming from. As he tries to escape, Ghost Rider releases the chain Coulson (Clark Gregg) throws at him and stays in the dimension, making sure his uncle does not get out.

As the finale ends, the agent S.H.I.E.L.D. Director Jeffrey Mace (Jason O'Mara) sends to get the LMD (Life Model Decoy) research done by Holden Radcliffe (John Hannah) is killed by the hands of AIDA (Mallory Jansen), an LMD herself. It is then revealed that she is keeping an unconscious Melinda May (Ming-Na Wen), and the May Coulson is with is apparently an LMD as well.

As Forbes reports, while the LMD concept is not new for Marvel Comics, it is still an unexplored plot for the ABC series, and is only hinted in The Avengers and Captain America: Winter Soldier.

This is, though, one of the theories used to explain the resurrection of Coulson, who was believed to be dead in the first Avengers movie. As explained by both the comics and the show, an LMD technically serves as a body double, mostly used by VIPs. It copies its owner's outer appearance perfectly, as well as its body language and thought patters. In the comics, Nick Fury is notably known to use LMDs.